Can supervise: YES
Vongphachanh, S, Gupta, AD, Milne-Home, W, Ball, J & Pavelic, P 2017, 'Hydrogeological reconnaissance of Sukhuma District, Champasak Province, Southern Laos', Journal of Hydrology New Zealand, vol. 56, no. 2, pp. 79-96.View/Download from: UTS OPUS
Sparse hydrogeological data is a significant limitation to the study of groundwater in many areas. The objective of this study was to assess the hydrogeology in Sukhuma District of Champasak Province in Southern Laos where such a limitation occurs. The connection between surface water and groundwater was assessed by comparing groundwater levels and river bed elevations. Groundwater recharge was estimated by the water table fluctuation method. The feasibility of remote sensing to address data limitations for the future study of groundwater in the region was also investigated by comparing the Mekong River flow and rainfall data with the Equivalent Water Height derived from the Gravity Recovery and Climate Experiment; soil moisture data obtained from the Global Land Data Assimilation System was also compared with rainfall and groundwater levels in Sukhuma District. The results show that some parts of Khamouan River bed are disconnected from the water table during the dry season, whereas the river bed is fully connected to the water table during the wet season. However, in the Pheung River, which flows into the Khamouan River upstream of the river gauge, the groundwater level is fully disconnected from the river bed in the dry season and partially connected in the wet season. Groundwater recharge estimates vary according to the specific yield values used for the aquifer. The comparison between in-situ hydrological measurement and remote sensing data provides insights into the general hydrogeological conditions. The comparison also provides useful information for future studies of the hydrogeology in Sukhuma District and Southern Laos, where field observation data are sparse, to support sustainable groundwater development in
Khazaei, E & Milne-Home, W 2017, 'Applicability of geochemical techniques and artificial sweeteners in discriminating the anthropogenic sources of chloride in shallow groundwater north of Toronto, Canada', Environmental Monitoring and Assessment, vol. 189, no. 5, pp. 1-13.View/Download from: UTS OPUS or Publisher's site
Elevated levels of chloride concentration due to anthropogenic activities including the road salts, septic effluent and agricultural sources are common in shallow groundwater of the recent glacial deposits north of Toronto, Ontario, Canada. Identifying suitable techniques for discriminating the source of the chloride concentration helps to better plan the protection of groundwater in the area. This paper examines the applicability of geochemical techniques with emphasis on Panno et al. (Ground Water 44: 176–187, 2006) and Mullaney et al. (2009) graphical approaches for discriminating the sources of chloride with known causes of impacts. The results indicated that the graphical methods developed using Cl−, Br− and/or total nitrogen (N) could identify the combined sources of road salts and septic systems. However, discriminating between the road salts, septic effluent or agricultural sources needs to be complemented by other techniques including the artificial sweeteners and isotope tracers.
Chuangcham, U, Wirojanagud, W, Charusiri, P, Milne-Home, WA & Lertsirivorakul, R 2009, 'Landfill site characterisation at Kham Bon village, Muang district, Khon Kaen province, NE Thailand', International Journal of Environment and Waste M..., vol. 4, no. 3/4, pp. 299-321.View/Download from: UTS OPUS or Publisher's site
The aim of the study is to characterise the Kham Hon landfill site. Hydrogeological and geochemical surveys were conducted and four boreholes were drilled. The hydraulic properties of the aquifer were tested, and soil, surface water and groundwater samples were collected at various times in the year. The physical and chemical properties of the samples, especially heavy metals, were analysed. The results indicated that Cd, Cr, Pb, Cu and Zn occurred in significant concentrations in the soil. The concentrations of Pb, Fe and Mn are high in surface water and groundwater. Moreover, the groundwater chemistry of the shallow aquifer was characterised by high concentrations of some ions. The major factors controlling leachate production and migration in this area are the seasonal variations in precipitation, the site topography, which controls the runoff patterns, and the soil type, which affects infiltration and solute transport to the water table.
Baginska, B, Milne-Home, WA & Cornish, PS 2003, 'Modelling nutrient transport in Currency Creek, NSW with AnnAGNPS and PEST', Environmental Modelling & Software, vol. 18, no. 37872, pp. 801-808.
Bradd, JM, Milne-Home, WA & Gates, G 1997, 'Overview of factors leading to dryland salinity and its potential hazard in New South Wales, Australia', Hydrogeology Journal, vol. 5, no. 1, pp. 51-67.View/Download from: Publisher's site
A proposed new method for predicting the occurrence of dryland salinity is to 1) map current outbreaks of dryland salinity at a broad regional scale; 2) process the results of investigations at various scales of inquiry; and 3) develop predictive tools using Geographic Information Systems (GIS). In New South Wales, Australia, the clearing of native vegetation has led to increased groundwater recharge, with a subsequent rise of water tables, thereby resulting in dryland salinity. Areas where increased recharge was observed throughout the State correspond to broad areas of vegetation clearing. Relationships also exist between the occurrence of salinity and the interaction of particular land attributes and environmental features that result in groundwater levels approaching the land surface. The new tool for mapping dryland-salinity hazard is based on the relationship that exists between the occurrence of dryland salinity and particular combinations of land attributes. Dryland-salinity occurrence was mapped spatially and digitised into a GIS, and GIS analysis was conducted with a statistical technique called 'weights of evidence.' Using this tool, the relative degrees of salinity hazard of different areas were identified that would result if a disturbance to the water balance were to take place. The results are shown on salinity-hazard maps, which aid in prioritising areas for allocating resources and managing areas that display high hazard.
Foerster, J & Milne-Home, WA 1995, 'Application of Agnps to Model Nutrient Generation Rates Under Different Farming Management Practices at the Gunnedah Research Centre Catchment', Australian Journal of Experimental Agriculture, vol. 35, no. 7, pp. 961-967.View/Download from: Publisher's site
Data collected at a conservation tillage trial site operational between 1971 and 1986 were used to assess the performance of the Agricultural Non-Point Source model (AGNPS). Eight trial plots, each of about 1 ha (average slope of 3.8%), were established on the black earths of paddock 2 at the Gunnedah Research Centre, New South Wales. The plots were subjected in pairs to stubble-burning, stubble incorporation, stubble-mulching, and no-tillage treatments. Runoff and peak flow rate from the plots, resulting from 5 rainfall events between 1982 and 1986, were used to calibrate the hydrology module of AGNPS. Hydrologic simulations for each plot and associated tillage treatment performed after calibration showed that conservation farming practices could effectively reduce runoff and peak flow rate. AGNPS was also used to simulate nutrient generation rates, defined as the transport of soluble and sediment-adsorbed nitrogen and phosphorus in runoff and sediment discharge, for the whole catchment for a number of rainfall events. The model predicted that nutrient movement could be reduced using best management practices, including the implementation of contour banks, contour cultivation, and no tillage. Additional information related to soil chemical properties and pore/surface water nutrient content could improve model performance. © 1995 CSIRO. All rights reserved.
Foerster, J & Milne-Home, WA 1995, 'Assessment of the Ability of LEACHM to Simulate Aldicarb Movement in a Hanwood Loam Soil Using Lysimeters', Australian Journal of Experimental Agriculture, vol. 35, no. 7, p. 1061.View/Download from: Publisher's site
Milne-Home, WA 1986, 'APPLICATION OF TEMPERATURE LOGS TO THE INTERPRETATION OF AN AQUIFER TEST NEAR SIPARIA, TRINIDAD.', West Indian journal of engineering, vol. 11, no. 1, pp. 31-37.
Boreholes 2 and 3 in the Siparia-Coora well field of the Water and Sewerage Authority were utilised for pumping tests of the F Sands and underlying G2 Sands aquifers within the Morne L'Enfer Formation. These boreholes are 4. 7 m. apart on the same site. Borehole 3 was pumped to test the F Sands, but drawdown also occurred in Borehole 2, which is completed in the G2 Sands, indicating vertical hydraulic communication between the boreholes. As a result, the interpretation of the test became indeterminate since the proportion of the flow derived from the G2 Sands was unknown. An estimate of this quantity was made from the analysis of a temperature log run in Borehole 2 soon after pumping was stopped. The analysis is a modification of a technique for calculating the temperature-depth profile due to the injection of hot fluid into a borehole.
This paper discusses the application of data on stream water chemistry to regional groundwater evaluation, hydrograph separation, and evaluation of the effects of basin disturbance. We have selected for analysis the Firebag, Steepbank and Muskeg River basins, and Hartley and Thickwood Creek basins in northern Alberta, Canada. They cover slightly more than 9000 km2 within a region containing vast quantities of surface mineable, oil sand deposits. All basins are drift covered and underlain by bedrock that can range in age from Precambrian to Cretaceous. Comparison of chemical data for stream water from all basins with that for groundwater from Hartley Creek basin confirms that groundwater is a major source of streamflow in winter. Indications are that this groundwater inflow is almost entirely from glacial drift. Hydrograph separations based on chemical parameters indicate that during the spring and summer the proportion of groundwater in the streamflow is less than winter values with the largest contribution by far coming from the drainage of muskeg. Muskeg thus exerts important control on stream discharge and chemistry. If surface mining in these basins causes the removal of muskeg and replacement by mineral soil, stream discharge from affected areas will be less during summer and more during spring runoff and stormflow periods. As well, major-ion concentrations should be generally higher in the summer and fall months. However, the impact of local disturbances in a larger basin will be diminished downstream as waters from affected areas are mixed with other waters. © 1982.
The Muskeg River basin has been the subject of a detailed, chemically based study of watersheds with extensive muskeg terrain. The objectives of this paper are to describe the chemical features of water from various components of the hydrologic cycle, and to interpret the groundwater and surface water processes in the watershed. Over a two-year period, it has been possible to characterize the variability in the major-ion chemistry of stream water, groundwater, muskeg water, and indirectly surface runoff. In most cases, waters are of the Ca2+Mg2+HCO-3-type but differ in that muskeg drainage and surface runoff are much more dilute than groundwaters from glacial drift units. Depending upon the time of year, stream water has a chemical composition that ranges between these groups. Streams in the Muskeg River basin are at baseflow only during the winter when there are no important sources of streamflow other than groundwater. At these times, the chemistry of the stream water and the average chemistry of groundwater from glacial drift units are nearly identical. Following spring snowmelt, drainage from muskeg is the main contributor to streamflow along with groundwater inflow. Stream water becomes chemically more similar to standing water in muskeg than to groundwater. During snowmelt runoff and other storm runoff periods, for example, September and October 1978, ion concentrations and specific conductance may be reduced further as direct precipitation and occasionally surface runoff contribute to streamflow. © 1982.
Baginska, B & Milne-Home, WA 2003, 'Parameter Sensitivity in Calibration and Validation of an Annualized Agricultural Non-Point Source Model' in Duan, Q, Gupta, HV, Sorooshian, S, Rousseau, AN & Turcotte, R (eds), Calibration of Watershed Models, American Geophysical Union, USA, pp. 331-345.
Vongphachanh, S, William, M-H, Ball, JE, Gupta, AD & Pavelic, P 2018, 'Estimation of soil infiltration and groundwater recharge in Sukhuma District of Southern Laos', The 21st Congress of IAHR-APD, The 21st Congress of IAHR-APD 2018 "Multi-perspective Water for Sustainable Development", Department of Civil and Environmental Engineering, Faculty of Engineering, Universitas Gadjah Mada, Yogyakarta, Indonesia, pp. 773-781.View/Download from: UTS OPUS
This study is presented to estimate net soil infiltration and groundwater recharge in Sukhuma District of Southern Laos. A soil water balance approach is used to estimate the net infiltration from the Tropical Rainfall Measuring Mission (TRMM) and Global Land Data Assimilation System (GLDAS) data. The groundwater recharge is estimated by using the water table fluctuation method from observation groundwater levels at eleven domestic wells and five paired observation wells (shallow and deep). The results show that average annual net infiltration flux from 2000-01 to 2015-16 is decreasing at a rate of 6 mm/year. For the same period of the net infiltration flux, the average annual rainfall derived from TRMM for the Sukhuma District also depicts a declining trend with a rate of 26 mm/year. A value of specific yield for the shallow fractured sandstone aquifer in the Sukhuma District is quantified at approximately 0.03. Groundwater recharge for 2012-13 and 2015-16 is estimated at 5% (118 mm) and 4% (95 mm) of annual rainfall, respectively. The net infiltration estimated from GLDAS and TRMM data shows reasonable agreement with the ground-based measurements. The results of the current study provide useful basic information for future groundwater resource management planning in Sukhuma District. The methods applied in this study may be also useful for studying the soil infiltration and groundwater recharge in regions with limited field data.
Ball, JE, Vongphachanh, S, Milne-Home, W & Das Gupta, A 2017, 'Seasonal Groundwater Level Fluctuations In Sukhuma District Of Southern Laos', Proceedings of the 37th IAHR World Congress, 37th IAHR World Congress, IAHR, Kuala Lumpur, pp. 5006-5014.View/Download from: UTS OPUS
The objective of this study is to investigate the seasonal fluctuation of groundwater level in Sukhuma District
by using observed data on groundwater, rainfall and streamflow from June 2015 to May 2016 and remote
sensing data derived from the Gravity Recovery and Climate Experiment (GRACE) and the Global Land Data
Assimilation System (GLDAS) for the period of June 2015 to March 2016. The results show that the
groundwater level in Sukhuma District increased to the peak elevation during the late wet season (September
– October) and it started declining from November until reached the lowest elevation during the late dry
season (April – May). Rainfall was found at a significant (P<0.01) factor influencing the groundwater level
fluctuation. The delay time between rainfall and groundwater level rise was also estimated at about 4 weeks.
Moreover, the results also show that groundwater level during the study period in Sukhuma District was not
yet depleted. However, the time-series for this analysis is very short to investigate the trend of groundwater
level in Sukhuma District. The results of this research also showed good correlation between the soil moisture
from GLDAS and groundwater level measurement in Sukhuma District (R2 = 0.91) and also showed a good
agreement between the soil moisture from GLDAS at a GRACE footprint and the equivalent water height
(EWH) derived from GRACE at a GRACE footprint with an R2 value of 0.72. Therefore, regarding the results
of this study, a further investigation using these remote sensing data for groundwater study in this region will
be carried out to support in groundwater study for Sukhuma and Southern Laos. The products from GRACE
and GLDAS will provide pivotal data for the study of hydrogeology in the areas with limited field observation
Vongphachanh, S, Milne-Home, W & Ball, J 2016, 'Groundwater Recharge Estimation in Sukhuma District, Champasak Province, Southern Laos: A Preliminary Assessment', 37th Hydrology & Water Resources Symposium 2016: Water, Infrastructure and the Environment, Water Infrastructure and the Environment Conference, Engineers Australia, Millennium Hotel, Queenstown, New Zealand, pp. 508-587.View/Download from: UTS OPUS
Southern Laos is undergoing economic and agricultural development, resulting in a large increase in groundwater and surface water use. However, these water resources are not known in detail. This study aims to investigate the groundwater and surface water interactions in the Sukhuma District of Champasak Province using a network of sixteen rain gauges and groundwater levels measurement points. Groundwater levels are measured weekly in eleven domestic wells, which are pumped irregularly, and also in five observation bores. Aquifer recharge occurs from direct infiltration of rainfall and also is derived using baseflow calculated from daily streamflow measurements at the re-established gauging station on the Khamouan River in Sukhuma District. The Khamouan River is connected to the groundwater in its lower reaches in both dry and wet seasons. Baseflow proportion to the total streamflow in the wet season 2015 has been estimated at 46%. The distribution of direct recharge has been mapped with ArcGIS and is spatially variable. Preliminary estimates of rainfall recharge have been calculated by the water table fluctuation method for 2015 but show a high degree of uncertainty related to the specific yield estimates. Time series analysis has confirmed the observed lag of some three to four weeks between the wet season start and rise in groundwater levels. These preliminary results indicate that there is close interaction between groundwater and surface water in the Sukhuma District. Further analysis will refine these results and extend them through remote sensing across southern Laos for application to integrated water resources management.
Vongphachanh, S, Milne-Home, W & Ball, JE 2016, 'Water infrastructure and the environment conference, 28 Nov – 2 Dec 2016, millennium hotel, queenstown, New Zealand groundwater recharge estimation in sukhuma district, champasak province, southern Laos: A preliminary assessment', 37th Hydrology and Water Resources Symposium 2016: Water, Infrastructure and the Environment, HWRS 2016.
© 2017 Engineers Australia. All Rights Reserved. Southern Laos is undergoing economic and agricultural development, resulting in a large increase in groundwater and surface water use. However, these water resources are not known in detail. This study aims to investigate the groundwater and surface water interactions in the Sukhuma District of Champasak Province using a network of sixteen rain gauges and groundwater levels measurement points. Groundwater levels are measured weekly in eleven domestic wells, which are pumped irregularly, and also in five observation bores. Aquifer recharge occurs from direct infiltration of rainfall and also is derived using baseflow calculated from daily streamflow measurements at the re-established gauging station on the Khamouan River in Sukhuma District. The Khamouan River is connected to the groundwater in its lower reaches in both dry and wet seasons. Baseflow proportion to the total streamflow in the wet season 2015 has been estimated at 46%. The distribution of direct recharge has been mapped with ArcGIS and is spatially variable. Preliminary estimates of rainfall recharge have been calculated by the water table fluctuation method for 2015 but show a high degree of uncertainty related to the specific yield estimates. Time series analysis has confirmed the observed lag of some three to four weeks between the wet season start and rise in groundwater levels. These preliminary results indicate that there is close interaction between groundwater and surface water in the Sukhuma District. Further analysis will refine these results and extend them through remote sensing across southern Laos for application to integrated water resources management.
Coulibaly, B, Ball, J, Hazelton, P & Milne-Home, W 2016, 'Water balance of the upper to middle Niger basin and the impact of climate change', 37th Hydrology and Water Resources Symposium 2016: Water, Infrastructure and the Environment, HWRS 2016.
© 2017 Engineers Australia. All Rights Reserved. The prolonged drought of the 1970's to 1990's caused serious impact on life of millions of people in the Niger Basin. Compared to the 1950's and 1960's, the annual rainfall and the flow in the Niger Basin (NB) were reduced by more than 30%. Many shallow wells, the main source of drinking water for villagers dried up in dry seasons. The inter-annual flood levels of the Internal Delta (ID) declined sharply. According to the Intergovermental Panel on Climate Change (IPCC) (McSweeney et al., 2010), the temperature of Mali, one of the Upper to Middle Niger Basin (UMNB) countries, is estimated to increase by 1.2oC to 3.6oC by the 2060's and result in decrease in the rainfall. Understanding the impact of climate change on the integrated surface and groundwater balance of the Niger Basin will be an important step toward adaptation to climate change. This paper is an overview of the data collected for detailed water balance analysis of the UMNB. This includes the Taoudeni/Tanezrouft/Iullemeden Aquifer System (TTIAS) that extends to part of the Senegal and Volta river basins. Data from more than 250 rainfall stations, more than 17000 bore wells in Mali and 50 river gauge stations have been considered across six countries Guinee, Cote d'Ivoire, Mauritania, Algeria, Mali and Burkina Faso. The standardized rainfall and peak flow indexes confirm a general downward trend for the rainfall and river flows from the 19970's to the early 1990's and then recovery up to 2014. Shallow well levels particularly in the fractured igneous rock and thin granular areas fluctuate with seasonal and inter-annual rainfalls. The thickness of the sedimentary rock deposits of the TTIAS, the fossil Groundwater (GW), the relatively high recharge rates of 0-100 mm/year (SEGUIN, 2005) and the GW residence time of over 32 years (Guendouz and Michelot, 2006) are such that these aquifers are unlikely to have been affected by the drought of the 1970's to 1990...
Staltari, P, Punthakey, J & Milne-Home, WA 2011, 'Risk Assessment Applications in Groundwater Management: the Macleay Sands coastal aquifer in NSW', NSW IAH Symposium 2011 - Hydrogeology in NSW - the Challenge of Uncertainty, NSW IAH Symposium, IAH NSW Branch, Dockside, Sydney, Australia, pp. 172-178.View/Download from: UTS OPUS
A risk management strategy for the groundwater industry, including a three tiered risk assessment tool, is proposed. The proposed risk management framework utilises a set of risk criteria and analyses risks to produce a risk ranking and assess management options to reduce the risk. The outcome of the assessment is the basis for a comprehensive study into groundwater management options and their associated activities. The tiered approach to risk management allows the user to adapt to all levels of study required, ensuring that risks are captured, analysed and transparent from early stages of planning through to in-depth management of existing resources. The proposed risk management framework is a formal decision making tool for assessment of groundwater management options. The method is transparent, easy to follow and standardises the decision making process for management of groundwater resources. The merits of a risk management approach to the sustainable management of coastal groundwater resources are demonstrated using a case study of the Macleay Sands aquifer on the mid-north coast of NSW. The scope of risk assessment included: security of groundwater supplies for coastal communities; seawater intrusion; urban development and water quality, and the sustainability of groundwater dependent ecosystems (GDE's). Risk management was examined with the three tiered assessment tool and SEAW AT modelling. The risk analyses have identified that climate risk has the argest overall risk ranking for the Macleay Sands aquifer.
Punthakey, J, Milne-Home, WA, Yunusa, IA, Theiveyanathan, T & Prathapar, S 2011, 'MODET - A modular model for estimating spatially distributed evapotranspiration, crop surface temperature and energy balance', NSW IAH Symposium 2011 - Hydrogeology in NSW - the Challenge of Uncertainty, NSW IAH Symposium, IAH NSW Branch, Dockside, Sydney, Australia, pp. 131-138.View/Download from: UTS OPUS
This paper describes a conceptnal framework for estimating spatially distributed evapotranspiration using a quasi two-layered resistance-energy balance model, which combines an energy balance equation for a crop surface and a modified Penman-Monteith combination equation. The modified equation allows estimation of transpiration from measured meteorological data and prescribed crop and soil parameters. The model predicts potential and actual evapotranspiration from a composite crop-soil surface by estimating components of the energy balance. The model requires hourly or daily averages of solar radiation, air temperature, humidity, and windspeed, along with estimates of canopy emissivity, albedo, crop height, and leaf area index. The model provides an analysis of the radiation and energy balance of the evaporation site, which includes net radiation, sensible, latent and soil heat fluxes. Canopy and leaf resistance, plant water potential and surface temperatures are also predicted by the model. These parameters estimate the response of the crop to enviromnentally induced water stress and can also be used as indicators for early warning of crop health. Modelled estimates of potential and actual evapotranspiration, crop surface temperature and plant water potential are presented for pasture in the Berriquin irrigation area.
Milne-Home, WA, SALLOUM, FM & SAFILI, NN 2004, 'Hydrogeology, Hydrogeochemistry and Isotope Hydrology of Al Kufrali and Sirt Basins, Eastern Libya', Geology of East Libya - Third Symposium on the Sedimentary Basins of Libya, Symposium on the Sedimentary Basins of Libya, Gutenberg Press Ltd, Binghazi, Libya, pp. 343-354.View/Download from: UTS OPUS
Large volumes of good quality groundwater occur in aquifers withinAl Kufrah and Sirt sedimentary basins. The main aquifer in Al Kufrah Basin is the Cretaceous Nubian Sandstone which consists of cross-bedded sandstones, conglomerates and shales. Other sandstone aquifers occur within the SilurianAcacus Sandstone and the Cambro-Ordovician Gargaf Group. Al Kufrah Basin forms a synclinal structure which is separated from the Sirt Basin to the north by the Jabal Az Zalmah uplift. Groundwater in the Nubian aquifer flows towards the northeast, but in the Sirt Basin aquifers it flows northwards towards Jab discharging into the depressions (Sabkhat A1 aliabT). The extent of the hydraulic connection between Al Kufrah and Sirt basins in the ThzirhO region is not clear, but groundwater may discharge from the aquifers in Al Kufrah Basin by upward leakage across the shales of the Silurian Tanezzufi Formation. The discharge would occur into the aquifers of Tertiary age in the Sin Basin whichunconformably overlie their older counterparts inAl Kufrah Basin. Hydrochemically, Al Kufrah groundwater is classified into sodium-chloride and calcium-bicarbonate facies, whereas Tazerbti and Sarir groundwaters are classified, respectively, into sodium-bicarbonate and sodium-chloride facies. These classifications are consistent with geochemical evolution and mixing along a generalized south to north and northeast fiowpath.
Wiszniewski, I, Lertsirivorakul, R, Merrick, NP, Milne-Home, WA & Last, R 2005, 'Groundwater flow section modelling of salinisation processes in the Champhone Catchment, Savannakhet Province, Lao PDR', SimMod Simulation and Modelling, International Conference on Simulation and Modeling, On web, Nakornpathom, Thailand, pp. 1-9.View/Download from: UTS OPUS
A steady state, two-dimensional vertical section groundwater flow model has been developed for a salinised area of the Xe Champhone catchment in Savannakhet province, Southern Lao PDR. The area is underlain by evaporite beds and clastic sedimentary rocks of the Khorat Group that are the source of salt found in groundwater and surface soils. The Xe Champhone catchment is of interest because of plans for construction of several new reservoirs and extensive expansion of irrigated areas. This study provides an example of how a relatively sparse and limited data set has been used to construct and successfully calibrate a numerical flow model to investigate groundwater flow patterns and potential impacts of increased groundwater recharge on land salinisation. Results show the predominance of local flow systems and that deeper flow systems in contact with the rock salt layer operate over much longer time scales in the order of millions of years.
Lertsirivorakul, R, Milne-Home, WA, Last, R, Wiszniewski, I & Merrick, NP 2005, 'Hydrogeology and salinity of the Kengkok area, Lao PDR', Geology, Geotechnology and Mineral Resources of Indochina (GEOINDO 2005), Geology, Geotechnology and Mineral Resources of Indochina (GEOINDO 2005), Khon Kaen University, Khon Kaen, Thailand, pp. 1-8.
Milne-Home, WA 2005, 'KKU, UTS and ACIAR: Partnership in Groundwater and Salinity Reserach', GEOINDO 2005, GEOINDO 2005, Khon Kaen University, Khon Kaen,Thailand, pp. 1-1.
Wiesner, DM, Knight, M & Milne-Home, WA 2003, 'Assessing the risks of deep injection of treated wastewater into an aquifer for storage and reclamation', ICM Proceedings, Integrated Catchment Management, AWA, UWS, Sydney, Australia, pp. 1-10.View/Download from: UTS OPUS
Baginska, B, Milne-Home, WA & Cornish, PS 2001, 'Modelling Nutrient Transport in Currency Creek, NSW with AnnAGNPS and PEST', Proceedings of MODSIM 2001, International Congress on Modelling and Simulation, Modelling and Simulation Society of Australia and New Zealand Inc, Canberra, Australia, pp. 197-202.
Bidkar, A, Vigneswaran, S, Milne-Home, WA, Ngo, H & Moon, H 2000, 'Adsorption of Metsulfuron-Methyl on Granular Activated Carbon', Proceedings of the 4th International Symposium on Environmental Geotechnology and Global Sustainable Development, CEEST, Boston (Danvers), Massachusetts, USA, pp. 1079-1086.
Vongphachanh, S, Milne-Home, WILLIAM, Gupta, AD, Ball, JAMESE & Pavelic, P 2017, 'Seasonal groundwater storage fluctuation in Sukhuma District of Southern Laos by field assessment and remote sensing'.View/Download from: UTS OPUS
GEOINDO2015, International Conference,
'Geology, Geotechnology and Mineral Resources of Indochina',
23-24/11/2015, Khon Kaen, Thailand
GRACE detection of seasonal variations in total water storage in southern Lao PDR
Sinxay Vongphachanh1 and William Milne-Home1
1School of Civil and Environmental Engineering, Faculty of Engineering and Information Technology, University of Technology, Sydney, Australia
Contact email: firstname.lastname@example.org
In 2013, a new website domain for the Gravity Recovery and Climate Experiment (GRACE) was developed by the Australian National University. This website provides a Data Visualisation Tool (DVT) by which users can estimate the equivalent water height (EWH) from a user specified region (polygon) or point. However, this website does not explain clearly enough about the precision of areal and point data derived from the DVT. Therefore, this study investigated the GRACE data detection of the total water storage (TWS, expressed as EWH) fluctuation in wet and dry seasons in southern Lao PDR. A basin scale of about 25,000 km2 was utilised to investigate the GRACE detection of TWS changes in southern Lao PDR, one of the main target areas for agricultural development. The total water availability in this area is currently not yet known exactly. This study compares the values of GRACE EWH derived from an area of 25,000 km2 with EWH points and observed stream water level data of Mekong River at Pakse hydro-meteorology station, Champasack province. Additionally, this study also compares the values of GRACE EWH point derived from different soil types and different land-use types. The results suggest that the GRACE can detect the seasonal flux of EWH and the extreme flood events in southern Lao PDR. It can be concluded that GRACE data can be used to estimate the total groundwater storage, surface water storage and soil moisture in southern Lao PDR. The proportion of soil and land use types could have a high...