Your search found 102 records
1 Wassmann, R.; Hien, N. X.; Hoanh, Chu Thai; Tuong, T. P. 2004. Sea level rise affecting the Vietnamese Mekong Delta: water elevation in the flood season and implications for rice production. Climatic Change, 66:89-107.
River basins ; Hydrology ; Models ; Rice ; Crop production ; Climate change ; Flood water ; Sea level ; Deltas / Vietnam / Mekong Delta
(Location: IWMI-HQ Call no: IWMI 333.91 G784 WAS Record No: H035796)
2 Stanley, D. J.; McRea, J. E.; Waldron, J. C. 1996. Nile Delta drill core and sample database for 1985-1994: Mediterranean Basin (MEDIBA) Program. Washington, DC, USA: Smithsonian Institution Press. 428p. (Smithsonian Contributions to the Marine Sciences 37)
Databases ; Geology ; Surveys ; River basins ; Deltas ; Research projects ; Environmental effects ; Climate / Egypt / Nile River Delta
(Location: IWMI-HQ Call no: 551.7 G232 STA Record No: H041322)
3 Gamage, Nilantha; Smakhtin, Vladimir. 2009. Do river deltas in east India retreat?: a case of the Krishna Delta. Geomorphology, 103(4):533-540. [doi: https://doi.org/10.1016/j.geomorph.2008.07.022]
Erosion ; Coastal area ; Environmental effects ; Reservoirs ; Sedimentation ; Case studies ; Deltas / India / Krishna River Basin / Godavari River Basin
(Location: IWMI HQ Call no: e-copy only Record No: H042785)
(1.15 MB)
The construction of multiple dams and barrages in many Indian River basins over the last few decades significantly reduced river flow to the sea and affected the sediment regime. More reservoir construction is planned through the proposed National River Linking Project (NRLP), which will transfer massive amounts of water from the North to the South of India. The impacts of these developments on fertile and ecologically sensitive deltaic environments are poorly understood and quantified at present. In this paper an attempt is made to identify, locate and quantify coastal erosion and deposition processes in one of the major river basins in India—the Krishna—using a time series of Landsat images for 1977, 1990 and 2001 with a spatial resolution ranging from 57.0 m to 28.5 m. The dynamics of these processes are analyzed together with the time series of river flow, sediment discharge and sediment storage in the basin. Comparisons are made with similar processes identified and quantified earlier in the delta of a neighboring similarly large river basin—the Godavari. The results suggest that coastal erosion in the Krishna Delta progressed over the last 25 years at the average rate of 77.6 ha yr- 1, dominating the entire delta coastline and exceeding the deposition rate threefold. The retreat of the Krishna Delta may be explained primarily by the reduced river inflow to the delta (which is three times less at present than 50 years ago) and the associated reduction of sediment load. Both are invariably related to upstream reservoir storage development.
4 Johnson, J. H. 1983. Preliminary appraisal of the hydrogeology of the Lower Mekong Basin: a study supported by UNESCO. Draft report prepared for the Interim Committee for Coordination of Investigations of the Lower Mekong Basin, Lao PDR, Thailand and Vietnam. 101p. + annexes.
River basins ; Hydrogeology ; Projects ; Geology ; Topography ; Catchment areas ; Valleys ; Water supply ; Water quality ; Downstream ; Aquifers ; Drainage ; Deltas / Laos / Thailand / Vietnam / Lower Mekong Basin
(Location: IWMI HQ Call no: e copy SF Record No: H044479)
5 Nguyen, T. T. H.; De Bie, C. A. J. M.; Ali, A.; Smaling, E. M. A.; Hoanh, Chu Thai. 2011. Mapping the irrigated rice cropping patterns of the Mekong delta, Vietnam, through hyper-temporal SPOT NDVI image analysis. International Journal of Remote Sensing, 33(2):415-434. [doi: https://doi.org/10.1080/01431161.2010.532826]
Irrigated rice ; Crop management ; Remote sensing ; Mapping ; Deltas ; Image analysis ; Vegetation ; Indicators ; Data / Vietnam / Mekong delta
(Location: IWMI HQ Call no: e-copy only Record No: H044487)
(3.68 MB)
Successful identification and mapping of different cropping patterns under cloudy conditions of a specific crop through remote sensing provides important baseline information for planning and monitoring. In Vietnam, this information is either missing or unavailable; several ongoing projects studying options with radar to avoid earth observation problems caused by the prevailing cloudy conditions have to date produced only partial successes. In this research, optical hyper-temporal Satellite Pour l’Observation de la Terre (SPOT) VEGETATION (SPOT VGT) data (1998–2008) were used to describe and map variability in irrigated rice cropping patterns of the Mekong delta. Divergence statistics were used to evaluate signature separabilities of normalized difference vegetation index (NDVI) classes generated from the iterative self-organizing data analysis technique algorithm (ISODATA) classification of 10-day SPOT NDVI image series. Based on this evaluation, a map with 77 classes was selected. Out of these 77 mapped classes, 26 lasses with prior knowledge that they represent rice were selected to design the sampling scheme for fieldwork and for crop calendar characterization. Using the collected information of 112 farmers’ fields belonging to the 26 selected classes, the map produced provides highly accurate information on rice cropping patterns (94% overall accuracy, 0.93 Kappa coefficient). We found that the spatial distributions of the triple and the double rice cropping systems are highly related to the flooding regime from the Hau and Tien rivers. Areas that are highly vulnerable to flooding in the upper part and those that are saline in the north-western part of the delta mostly have a double rice cropping system, whilst areas in the central and the south-eastern parts mostly have a triple rice cropping system. In turn, the duration of flooding is highly correlated with the decision by farmers to cultivate shorter or longer duration rice varieties. The overall spatial variability mostly coincides with administrative units, indicating that crop pattern choices and water controlmeasures are locally synchronized. Water supply risks, soil acidity and salinity constraints and the anticipated highly fluctuating rice market prices all strongly influence specific farmers’ choices of rice varieties. These choices vary considerably annually, and therefore grown rice varieties are difficult to map. Our study demonstrates the high potential of optical hyper-temporal images, taken on a daily basis, to differentiate and map a high variety of irrigated rice cropping patterns and crop calendars at a high level of accuracy in spite of cloudy conditions.
6 Foufoula-Georgiou, E.; Syvitski, J.; Paola, C.; Hoanh, Chu Thai; Tuong, P.; Vorosmarty, C.; Kremer, H.; Brondizio, E.; Saito, Y.; Twilley, R. 2011. International year of deltas 2013: a proposal. EOS - Transactions, American Geographical Union, 92(40):340-341.
(Location: IWMI HQ Call no: e-copy only Record No: H044486)
(0.48 MB)
Marine and lacustrine deltas around the world are economic and environmental hot spots. They occupy approximately 1% of the Earth's land area but are home to more than 500 million people—a population density more than 10 times the world average [Ericson et al., 2006]—all within 5 meters of sea level [Overeem and Syvitski, 2009]. This high density is supported by high productivity, rich biodiversity, and transport along a network of waterways. Yet deltaic systems are some of the world's most delicate and vulnerable natural systems, residing at the boundary between land and water, and are subject to upstream human control, local resource exploration, and climatic impacts.
7 Johnston, Robyn; Hoanh, Chu Thai; Lacombe, Guillaume; Lefroy, R.; Pavelic, Paul; Fry, Carolyn. 2012. Managing water in rainfed agriculture in the Greater Mekong Subregion. Final report prepared by IWMI for Swedish International Development Cooperation Agency (Sida). Colombo, Sri Lanka: International Water Management Institute (IWMI); Stockholm, Sweden: Swedish International Development Cooperation Agency (Sida). 100p. [doi: https://doi.org/10.5337/2012.201]
Water management ; Agroecology ; Environment ; Rainfed farming ; Irrigated farming ; Farming systems ; Crop production ; Agricultural production ; Yields ; Poverty ; Climate change ; Drought ; Floodplains ; Rain ; Mapping ; Case studies ; Reservoirs ; Deltas ; Groundwater ; Farm ponds ; Water storage ; Rivers ; Lowland ; Highlands ; Plains ; Landscape ; Coastal area ; Urban areas ; Aquifers / Southeast Asia / Cambodia / Laos / Myanmar / Thailand / Vietnam / Greater Mekong Subregion
(Location: IWMI HQ Call no: e-copy only Record No: H044646)
(4.39 MB) (2.44MB)
8 Reed, C. 2009. Where sinking land meets rising water. Global Change, 74:32-35.
(Location: IWMI HQ Call no: e-copy only Record No: H044708)
http://www.igbp.net/download/18.1b8ae20512db692f2a680007108/NL74-deltas.pdf
https://vlibrary.iwmi.org/pdf/H044708.pdf
https://vlibrary.iwmi.org/pdf/H044708.pdf
(0.35 MB) (354.47 KB)
9 Johnston, Robyn; Hoanh, Chu Thai; Lacombe, Guillaume; Lefroy, R.; Pavelic, Paul; Fry, C. 2012. Improving water use in rainfed agriculture in the Greater Mekong Subregion. Summary report. [Summary report of the Project report prepared by IWMI for Swedish International Development Agency (Sida)]. Colombo, Sri Lanka: International Water Management Institute (IWMI); Stockholm, Sweden: Swedish International Development Cooperation Agency (Sida) 44p. [doi: https://doi.org/10.5337/2012.200]
Water management ; Water use ; Groundwater ; Rainfed farming ; Irrigated farming ; Agricultural production ; Crops ; Rice ; Yield gap ; Environmental effects ; Case studies ; Deltas ; Reservoirs ; Farm ponds ; Farmers ; Agroecology ; Climate change ; Drought / Southeast Asia / Cambodia / Laos / Myanmar / Thailand / Vietnam / China / Greater Mekong Subregion
(Location: IWMI HQ Call no: IWMI Record No: H044801)
(3.18MB)
10 Kitissou, M.; Ndulo, M.; Nagel, M.; Grieco, M. (Eds.) 2007. The hydropolitics of Africa: a contemporary challenge. Newcastle, UK: Cambridge Scholars. 344p.
Water resources development ; Water management ; Participatory management ; Water supply ; Water availability ; Water use ; Water policy ; Water rights ; Water law ; Drinking water ; Water demand ; Political aspects ; River basin management ; Watershed management ; History ; International waters ; Capacity building ; Watercourses ; Livestock ; Food security ; Environmental effects ; Reservoirs ; Wetlands ; Deserts ; Dams ; Deltas ; Economic development ; Socioeconomic development ; Rural areas ; Institutions ; Case studies ; International cooperation ; Poverty ; Sanitation ; Privatization / Africa / Ethiopia / Egypt / Sudan / Mali
/ Nile River Basin / Volta Basin / Senegal River Valley
/ Nile River Basin / Volta Basin / Senegal River Valley
(Location: IWMI HQ Call no: 333.91 G000 KIT Record No: H044804)
(0.27 MB)
11 Hoanh, Chu Thai; Phong, N. D.; Trung, N. H.; Dung, L. C.; Hien, N. X.; Ngoc, N. V.; Tuong, T. P. 2012. Modelling to support land and water management: experiences from the Mekong River Delta, Vietnam. Water International, 37(4):408-426. (Special issue on "How hydrological models support informed decision making in developing countries" with contributions by IWMI authors). [doi: https://doi.org/10.1080/02508060.2012.706797]
Water management ; Water use ; Land management ; Land use ; Rivers ; Deltas ; Simulation models ; Optimization ; Policy making ; Hydrodynamics ; Water quality ; Canals ; Flood control ; Salinity control ; Aquaculture / Vietnam / Mekong River Delta
(Location: IWMI HQ Call no: PER Record No: H045027)
(3.15 MB)
By comparing the successful story of a hydrodynamic model (based on its contribution to policy changes, management options and livelihood improvement) with other modelling cases in the Mekong River Delta, five success factors are identified. These are (1) simulated phenomena relevant to and understandable by policy makers; (2) response to the needs of policy setting; (3) developed and handled by national modellers with direct links to the policy process; (4) availability of input data; and (5) long application history. These success factors provide higher opportunities for engaging modelling activities with policy setting.
12 Stroud, J. L.; Norton, G. J.; Islam, M. R.; Dasgupta, T.; White, R. P.; Price, A. H.; Meharg, A. A.; McGrath, S. P.; Zhao, F-J. 2011. The dynamics of arsenic in four paddy fields in the Bengal Delta. Environmental Pollution, 159:947-953.
Arsenic ; Paddy fields ; Rice ; Irrigation water ; Groundwater ; Soil water ; Deltas ; Tube wells / India / Bengal Delta
(Location: IWMI HQ Call no: e-copy only Record No: H045041)
(0.58 MB)
Irrigation with arsenic contaminated groundwater in the Bengal Delta may lead to As accumulation in the soil and rice grain. The dynamics of As concentration and speciation in paddy fields during dry season (boro) rice cultivation were investigated at 4 sites in Bangladesh and West Bengal, India. Three sites which were irrigated with high As groundwater had elevated As concentrations in the soils, showing a significant gradient from the irrigation inlet across the field. Arsenic concentration and speciation in soil pore water varied temporally and spatially; higher As concentrations were associated with an increasing percentage of arsenite, indicating a reductive mobilization. Concentrations of As in rice grain varied by 2e7 fold within individual fields and were poorly related with the soil As concentration. A field site employing alternating flooded-dry irrigation produced the lowest range of grain As concentration, suggesting a lower soil As availability caused by periodic aerobic conditions.
13 Lacombe, Guillaume; Hoanh, Chu Thai; Valero, T. 2012. Effectiveness of early warning systems and monitoring tools in the Mekong Basin. In Anbumozhi, V.; Breiling, M.; Pathmarajah, S.; Reddy, V. R. (Eds.). Climate change in Asia and the Pacific: how can countries adapt?. New Delhi, India: Sage. pp.196-205.
Early warning systems ; Monitoring ; River basins ; Deltas ; Flooding ; Rain ; Drought ; Forecasting ; Models / Vietnam / Mekong River Basin
(Location: IWMI HQ Call no: e-copy only Record No: H045067)
(4.19 MB)
14 Turton, A.; Ashton, P. J.; Cloete, E. (Eds.) 2003. Transboundary rivers, sovereignty and development: hydropolitical drivers in the Okavango River Basin. Pretoria, South Africa: African Water Issues Research Unit; Geneva, Switzerland: Green Cross International. 368p.
River basins ; International waters ; Water resources ; Water use ; Cooperation ; Deltas ; Watersheds ; Freshwater ; Decision making ; Policy making / Southwest Africa / Namibia / Okavango River Basin
(Location: IWMI HQ Call no: 333.91 G000 TUR Record No: H045094)
(0.28 MB)
15 Rebelo, Lisa-Maria; McCartney, Matthew. 2012. Wetlands of the Nile Basin: distribution, functions and contribution to livelihoods. In Awulachew, Seleshi Bekele; Smakhtin, Vladimir; Molden, David; Peden D. (Eds.). The Nile River Basin: water, agriculture, governance and livelihoods. Abingdon, UK: Routledge - Earthscan. pp.212-228.
River basins ; Wetlands ; Ecosystems ; Marshes ; Deltas ; Water resources ; Agricultural production ; Fisheries ; Case studies ; Social aspects ; Living standards / Africa / Ethiopia / Sudan / Nile River Basin
(Location: IWMI HQ Call no: IWMI Record No: H045318)
(1.34MB)
16 El-Agha, D. E.; Molden, David; Ghanem, A. M. 2011. Performance assessment of irrigation water management in old lands of the Nile Delta of Egypt. Irrigation and Drainage Systems, 25(4):215-236. [doi: https://doi.org/10.1007/s10795-011-9116-z]
Irrigation water ; Water management ; Deltas ; Water saving ; Evapotranspiration ; Indicators ; Cropping patterns ; Water supply ; Water depletion ; Water productivity ; Canals ; Economic aspects / Egypt / Nile Delta
(Location: IWMI HQ Call no: PER Record No: H045473)
http://download.springer.com/static/pdf/222/art%253A10.1007%252Fs10795-011-9116-z.pdf?auth66=1354689115_e0ae8e40ad7ce8470b7d3d9088e41ab3&ext=.pdf
https://vlibrary.iwmi.org/pdf/h045473.pdf
https://vlibrary.iwmi.org/pdf/h045473.pdf
(1.51 MB) (1.51MB)
This paper provides the methodology and results of a cross-scale diagnostic performance assessment program of the irrigation water management in the old lands of the Nile Delta of Egypt. The analysis was done at three levels; main canal level, branch canals level and on-farm level of the Meet Yazid command (82,740 ha) for the year 2008–2009 to highlight areas for improvement. At the main canal level the annual average percentage of irrigation water returning to drains and groundwater was 53% of the total water supplied. Since Meet Yazid lies at tail end of the delta, and there is groundwater salinity, opportunities for reuse are increasingly limited moving north to Lake Burullus. This would indicate opportunities for real water savings. The results of monthly relative water supply of the main canal indicated mismatch between demand and supply especially during the winter months, and when supply is low farmers do reuse drainage or groundwater. Also, the assessment of the three branch canals showed non-uniformity of water distribution and mismatch between demand and supply even when comparing improved and non-improved canals. At the on-farm level in paddy fields, the amount of irrigation flows to drains and saline sinks varied from 0.46 to 0.71 of inflow. In spite of these values of non-uniformity and low depleted fraction, the relative evapotranspiration (ratio of actual to potential) evaporation was uniformly high, indicating most crops of most farmers were not water stressed, which is also confirmed by the high yield values. The average values of productivity per unit water depleted by ETact were 1.04 and 1.05 kg/m 3 for rice and wheat fields, respectively, with yields of rice and wheat at 8 and 6 t per ha respectively. On farm and tertiary improvements alone will not yield real water savings, as excess water in the main canal and drains will continue to flow out of the system. Rather the focus should first be on supplies to the main canal, accompanied by more precise on farm and water delivery practices at branch and tertiary levels, and ensuring that environmental flows are met. There is an added advantage of focusing on this tail end region of Egypt that this response would lessen vulnerability to reuse of polluted and saline water.
17 Inada, Yoshiaki. 2012. The International Water Management Institute’s work on climate change and possibilities for Myanmar: seeking solution for the measure of adaptation and mitigation against the impact. In Myanmar. Irrigation Department. Proceedings of Symposium on Water Management for Paddy Field Irrigation and Impacts of Climate Change and the 9th INWEPF Steering Meeting, Yangon, Myanmar, 6-9 November 2012. Yangon, Myanmar: Irrigation Department. pp.73-77.
Research institutes ; Climate change ; Agricultural production ; Water storage ; Saline water ; Deltas / Myanmar
(Location: IWMI HQ Call no: e-copy only Record No: H045576)
(0.41 MB)
As water is perhaps the most important element in climate change adaption, in particular as related to agriculture, IWMI has focused considerable resources on the topic of climate change and has been at the forefront of climate change science as related to agricultural adaption in the developing world. IWMI’s climate work has been focused on 1) better information to understand the impacts of climate change on farmers, 2) understanding the range of storage options-from natural wetlands, groundwater aquifers, and ponds to large scale dams-that can help farmers adapt to changing water supply as well as extreme events, and 3) understanding how changes in water governance can increase farmer options and improve outcomes. Of particular relevance is work conducted in the Mekong Delta on issues associated with changing salinity as a consequence of sea level rise, and a recent synthesis of the relationship between climate change, water and agriculture in the Mekong sub-region. This paper will highlight how existing work can be applied to the issues of Myanmar and promising directions for future work, especially as related to the Ayeyarwady Delta.
18 Rebelo, Lisa-Maria; Johnston, Robyn; Hein, T.; Weigelhofer, G.; DHaeyer, T.; Kone, B.; Cools, J. 2012. Challenges to the integration of wetlands into IWRM [Integrated Water Resources Management]: the case of the inner Niger Delta (Mali) and the Lobau Floodplain (Austria). Environmental Science and Policy, 34:58-68. [doi: https://doi.org/10.1016/j.envsci.2012.11.002]
Wetlands ; Water management ; Deltas ; Floodplains ; Ecosystems ; River basin management ; Institutions ; Legal aspects / Mali / Austria / Niger Delta / Lobau Floodplain / Lobau Wetland / Danube River Basin
(Location: IWMI HQ Call no: e-copy only Record No: H045586)
(1.09 MB)
Wetlands are too often perceived as standalone elements and are poorly integrated into river basin management. The Ramsar Convention recognizes the critical linkage between wetlands, water and river basin management; the governments that are party to the Convention have committed to conserving their wetlands within a framework of Integrated Water Resources Management (IWRM). The “Critical Path” approach and related guidance have been adopted by Contracting Parties of the Ramsar Convention in order to effectively integrate wetland conservation and management into river basin management planning and decision-making. However, despite international acceptance of the approach, it is not widely implemented. This paper provides one of the first case study based assessments of the Critical Path approach. The analysis of two contrasting Ramsar sites is presented in order to better understand the barriers to implementation in different development contexts. These are the Lobau wetland in Austria, where management institutions and regulatory frameworks are highly developed; and the Inner Niger Delta in Mali, where the capacity to implement IWRM is less evolved. A planning approach is proposed which involves structured and transparent methods for assessing ecosystem services and institutional capacity, and is suitable as a tool for identifying, prioritizing and negotiating trade-offs in ecosystem services and improving livelihoods. Based on the analysis, two main barriers to implementation are identified; mismatch between local and national or basin level priorities, and a lack of recognition of the ecosystem services provided by wetlands.
19 Phong, N.; Tuong, T. P.; Hoanh, Chu Thai. 2013. Managing acidic pollution in a coastal area in Mekong River Delta, Vietnam: case study of Bac Lieu Province [Abstract only]. In German Aerospace Center (DLR); Germany. Federal Ministry of Education and Research (BMBF). Mekong Environmental Symposium, Ho Chi Minh City, Vietnam, 5-7 March 2013. Abstract volume, Topic 07 - Mekong Basin aquatic ecology, biodiversity and water quality protection. Wessling, Germany: German Aerospace Center (DLR); Bonn, Germany: Federal Ministry of Education and Research (BMBF). 1p.
Coastal area ; Water pollution ; Acidity ; Rivers ; Deltas ; Canals / Vietnam / Bac Lieu Province / Mekong River Delta
(Location: IWMI HQ Call no: e-copy only Record No: H045824)
http://www.mekong-environmental-symposium-2013.org/frontend/file.php?id=3020&dl=1
https://vlibrary.iwmi.org/pdf/H045824.pdf
https://vlibrary.iwmi.org/pdf/H045824.pdf
(0.08 MB) (2.09MB)
20 Phong, N.; Ngoc, N. V.; Tho, T. Q.; Dong, T. D.; Tuong, T. P.; Hoanh, Chu Thai; Hien, N. X.; Khoi, N. H. 2013. Impact of sea level rise on submergence, salinity and agricultural production in a coastal province of the Mekong River Delta, Vietnam [Abstract only]. In German Aerospace Center (DLR); Germany. Federal Ministry of Education and Research (BMBF). Mekong Environmental Symposium, Ho Chi Minh City, Vietnam, 5-7 March 2013. Abstract volume, Topic 09 - Mekong Delta: climate change related challenges. Wessling, Germany: German Aerospace Center (DLR); Bonn, Germany: Federal Ministry of Education and Research (BMBF). 1p.
Water management ; Sea level ; Salinity ; Submergence ; Agricultural production ; Coastal area ; Rivers ; Deltas / Vietnam / Mekong River Delta
(Location: IWMI HQ Call no: e-copy only Record No: H045825)
http://www.mekong-environmental-symposium-2013.org/frontend/file.php?id=3020&dl=1
https://vlibrary.iwmi.org/pdf/H045825.pdf
https://vlibrary.iwmi.org/pdf/H045825.pdf
(0.08 MB) (2.09MB)
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