Your search found 5 records
1 Nguyen, H. T.; Gupta, A. D.; Vongvisessomjai, S. 1993. Assessment of surface water resources in tidal areas. In Tingsanchali, T. (Ed.), Proceedings of the International Conference on Environmentally Sound Water Resources Utilization, Bangkok, Thailand, 8-11 November 1993. Vol.1. Bangkok, Thailand: AIT. pp.II-243-251.
Surface water ; Water resources ; Mathematical models ; Simulation ; Salt water intrusion ; Salinity ; Rivers ; Case studies / Vietnam / Mekong Delta
(Location: IWMI-HQ Call no: 333.91 G000 TIN Record No: H015804)
2 Tingsanchali, T.; Nguyen, H. T.. 1993. Water resources utilization in Tam Phuong Tidal Irrigation Project, Viet Nam. In Tingsanchali, T. (Ed.), Proceedings of the International Conference on Environmentally Sound Water Resources Utilization, Bangkok, Thailand, 8-11 November 1993. Vol.2. Bangkok, Thailand: AIT. pp.III-119-128.
Irrigation programs ; Water resources ; Water use ; Mathematical models ; Simulation ; Rain ; Drainage / Vietnam / Mekong Delta
(Location: IWMI-HQ Call no: 333.91 G000 TIN Record No: H015827)
3 Nguyen, H-T.; Vongvisessomjai, S. 2001. Rating curve and energy drop in the sedone River. Water Resources Journal, 209:21-31.
Rivers ; Flow ; Simulation models ; Energy ; Hydroelectric schemes ; Canals ; Siltation ; Open channels / Laos / Sedone River / Selabam Waterfall / Mekong River
(Location: IWMI-HQ Call no: PER Record No: H029004)
4 Nguyen, H. T.; de Bruyn, L. L.; Koech, R. 2016. Impact of hydropower dam development on agriculturally based livelihoods of resettled communities: a case study of Duong Hoa Commune in central Vietnam. International Journal of Water Resources Development, 32(6):978-996. [doi: https://doi.org/10.1080/07900627.2015.1121138]
Water power ; Dam construction ; Living standards ; Agricultural production ; Rural settlement ; Communes ; Households ; Income ; Reservoirs ; Forest land ; River basins ; Animal husbandry ; Forestry ; Case studies / Vietnam / Huong River Basin / Ta Trach Reservoir
(Location: IWMI HQ Call no: e-copy only Record No: H047931)
Dam development is widespread in central Vietnam. Interviews were conducted with households that had been resettled and those that had not to determine the type of agricultural livelihoods that were re-established nine years after resettlement due to the Ta Trach reservoir project. Results showed that resettled households, despite having more forest land, were economically worse off compared with households that were not moved. This discrepancy between households was attributed to less arable land allocated to resettled households. The provision of good-quality land, able to grow crops and food trees, was essential if households were to re-establish a comparable agriculturally based livelihood.
5 Duy, N. L.; Nguyen, T. V. K.; Nguyen, D. V.; Tran, A. T.; Nguyen, H. T.; Heidbüchel, I.; Merz, B.; Apel, H. 2021. Groundwater dynamics in the Vietnamese Mekong Delta: trends, memory effects, and response times. Journal of Hydrology: Regional Studies, 33:100746. [doi: https://doi.org/10.1016/j.ejrh.2020.100746]
Groundwater table ; Alluvial aquifers ; Surface water ; Water levels ; Groundwater recharge ; Groundwater extraction ; Coastal areas ; Flooding ; Deltas ; Hydrology ; Trends ; Time series analysis / Vietnam / Mekong Delta
(Location: IWMI HQ Call no: e-copy only Record No: H050286)
https://www.sciencedirect.com/science/article/pii/S2214581820302202/pdfft?md5=b8797d9247dc390e0ee5968b020889b8&pid=1-s2.0-S2214581820302202-main.pdf
https://vlibrary.iwmi.org/pdf/H050286.pdf
https://vlibrary.iwmi.org/pdf/H050286.pdf
(9.24 MB) (9.24 MB)
Study Region: Vietnamese Mekong Delta.
Study focus : This study investigates the trends of groundwater levels (GWLs), the memory effect of alluvial aquifers, and the response times between surface water and groundwater across the Vietnamese Mekong Delta (VMD). Trend analysis, auto- and cross-correlation, and time-series decomposition were applied within a moving window approach to examine non-stationary behavior.
New hydrological insights : Our study revealed an effective connection between the shallowest aquifer unit (Holocene) and surface water, and a high potential for shallow groundwater recharge. However, low-permeable aquicludes separating the aquifers behave as low-pass filters that reduce the high-frequency signals in the GWL variations, and limit the recharge to the deep groundwater. Declining GWLs (0.01-0.55 m/year) were detected for all aquifers throughout the 22 years of observation, indicating that the groundwater abstraction exceeds groundwater recharge. Stronger declining trends were detected for deeper groundwater. The dynamic trend analysis indicates that the decrease of GWLs accelerated continuously. The groundwater memory effect varied according to the geographical location, being shorter in shallow aquifers and flood-prone areas and longer in deep aquifers and coastal areas. Variation of the response time between the river and alluvial aquifers was controlled by groundwater depth and season. The response time was shorter during the flood season, indicating that the bulk of groundwater recharge occurred in the late flood season, particularly in the deep aquifers.
Study focus : This study investigates the trends of groundwater levels (GWLs), the memory effect of alluvial aquifers, and the response times between surface water and groundwater across the Vietnamese Mekong Delta (VMD). Trend analysis, auto- and cross-correlation, and time-series decomposition were applied within a moving window approach to examine non-stationary behavior.
New hydrological insights : Our study revealed an effective connection between the shallowest aquifer unit (Holocene) and surface water, and a high potential for shallow groundwater recharge. However, low-permeable aquicludes separating the aquifers behave as low-pass filters that reduce the high-frequency signals in the GWL variations, and limit the recharge to the deep groundwater. Declining GWLs (0.01-0.55 m/year) were detected for all aquifers throughout the 22 years of observation, indicating that the groundwater abstraction exceeds groundwater recharge. Stronger declining trends were detected for deeper groundwater. The dynamic trend analysis indicates that the decrease of GWLs accelerated continuously. The groundwater memory effect varied according to the geographical location, being shorter in shallow aquifers and flood-prone areas and longer in deep aquifers and coastal areas. Variation of the response time between the river and alluvial aquifers was controlled by groundwater depth and season. The response time was shorter during the flood season, indicating that the bulk of groundwater recharge occurred in the late flood season, particularly in the deep aquifers.
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