Your search found 17 records
1 Holecz, F.; Dwyer, E.; Monaco, S.; Schmid, B.; Frei, U.; Fischer, R. 2000. An operational rice field mapping tool using spaceborne SAR data. Paper presented at ERS-ENVISAT Symposium, G÷teborg, October 2000. 9p.
Rice ; Crop production ; Plant growth ; Monitoring ; Mapping ; Remote sensing ; GIS ; Models ; Data processing / Sri Lanka / Vietnam / Polonnaruwa / Mekong River Delta
(Location: IWMI-HQ Call no: P 5576 Record No: H027366)
2 Tu, D. T. 2002. Land and water investment in Viet Nam: Past trends, returns and future. In FAO. RAP. Investment in land and water û Proceedings of the Regional Consultation, Bangkok, Thailand, 3-5 October 2001. Bangkok, Thailand: FAO. RAP. pp.339-350.
Water resources ; Climate ; Environmental effects ; Irrigation systems ; Irrigation programs ; Dams ; Flood control ; Land development ; Water resource management ; Investment / Vietnam / Mekong River Delta / Red River / Ca River / Ma River
(Location: IWMI-HQ Call no: 631.7.4 G570 FAO Record No: H030018)
3 Edmonds, C. 2002. The role of infrastructure in land-use dynamics and rice production in Viet Nam’s Mekong River Delta. Manila, Philippines: ADB. 25p. (ERD working paper no.16)
Land use ; Estimation ; Simulation models ; Rice ; Agricultural economics / Vietnam / Mekong River Delta
(Location: IWMI-HQ Call no: 333 G784 EDM Record No: H031133)
4 Hoanh, Chu Thai; Tuong, T. P.; Gallop, K. M.; Gowing, J. W.; Kam, S. P.; Khiem, N. T.; Phong, N. D. 2003. Livelihood impacts of water policy changes: Evidence from a coastal area of the Mekong River Delta. Water Policy, 5(5/6):475-488.
Water policy ; Water quality ; Salinity control ; Rice ; Fish farming ; Living conditions ; Participatory rural appraisal ; River basins / Vietnam / Mekong River Delta / Ca Mau Peninsula
(Location: IWMI-HQ Call no: IWMI 333.91 G8784 HOA, PER, P 6702 Record No: H032176)
The coastal zone of the Mekong River delta has experienced rapid economic and environmental change during the last decade. Given the nature of the environment and the level of dependence on the natural resource base, policies for land and water were very influential in this process. The emphasis on rice created an imperative to control saline intrusion, which was realized through construction of major engineering works over an extended period (1994-2000). The inertia built up by this process led to a divergence between policy and practice, and adversely affected the livelihoods of fishers and of those farmers who live on aquaculture. This prompted the government to re-think about the rice-focus policy, in favor of a land and water policy for balanced rice and aquaculture production. The paper describes an analytical process, which was adopted to explore the feasibility of adopting the new policy for balanced development of both rice and shrimp production and discusses the impact of the new policy on farmers’ livelihoods.
5 Hoanh, Chu Thai; Tuong, T. P.; Khiem, N. T.; Nhan, N. V. 2004. Management of conflicts in rice-fishery production in the coastal zone of the Mekong River Delta and impacts on rural livelihood. Paper presented at the Mekong Rice Conference, Ho Chi Min City, Vietnam, 15-17 October 2004. 15p.
(Location: IWMI-HQ Call no: IWMI 631.7.2 G800 HOA Record No: H035889)
6 Hoanh, Chu Thai. 2004. Mekong river delta: effective water control for solving conflicts among agriculture, fisheries, aquaculture in coastal zones. Summary sheet of good practices for E-Forum of the FAO / Netherlands Conference on Water for Food and Ecosystems: make it happen!, The Hague, The Netherlands, 31 January - 5 February 2005. 3p.
River basins ; Water control ; Conflict ; Fisheries ; Fish farming ; Rice ; Water quality / South East Asia / Vietnam / Mekong River Delta
(Location: IWMI-HQ Call no: IWMI 631.7 G800 HOA Record No: H035888)
7 Fanslow, G.; Tuong, T. P.; Hoanh, Chu Thai; Phong, N. D.; An, L. T.; Hien, N. X. 2005. Land-use and salinity management effects on water quality in Ca Mau Peninsula, Vietnam. Paper presented at the International Conference on Environment and Livelihoods in Coastal Zones: Managing Agriculture-Fishery-Aquaculture Conflicts, Bac Lieu, Vietnam, 1-3 March 2005. Draft – not to be cited. 31p.
Land use ; Salinity control ; Water quality ; Models / Vietnam / Ca Mau Peninsula / Mekong River Delta
(Location: IWMI-HQ Call no: IWMI 333.91 G784 FAN Record No: H038166)
8 Hoanh, Chu Thai; Suhardiman, Diana; Tuan, L. A. 2010. Irrigation development for rice production in the Mekong Delta, Vietnam: what’s next? Paper presented at the International Rice Congress 2010, 28th International Rice Research Conference, Hanoi, Vietnam, 8-11 November 2010. 4p.
Rice ; Irrigated farming ; Salt water intrusion ; Shrimp culture ; Brackishwater aquaculture ; Canals / Vietnam / Mekong River Delta
(Location: IWMI HQ Call no: e-copy only Record No: H043364)
(0.32 MB)
The Vietnamese Mekong River Delta (MRD) has a total area of four million hectares for more than 18 million inhabitants in 2009 with abundant water resources (Can, 2000). Due to high seasonal variation with over 90% of rainfall and surface water concentrated during the flood season from May to November, the great potential for agriculture and aquaculture production in the MRD is only exploited if flood is controlled and irrigation in the dry season is improved. Therefore an extensive network of canals comprises of over 14,000 km of principal and primary canals, 27,000 km of secondary canals and 50,000 km of tertiary canals, and more than 20,000 km of protection dykes were built in the last 300 years. In 1985 Vietnam was still a net rice importing country, but in 1989 and 1999 it exported 1.4 and 4.6 million tons, respectively, of which the contributed more than 90%. This remarkable increase in rice production is related to the rapid growth of rice planted area in the past 35 years aided by the expansion and increased density of the irrigation and drainage system.
9 Palis, F. G.; Singleton, G. R.; Casimero, M. C.; Hardy, B. (Eds.) 2010. Research to impact: case studies for natural resource management for irrigated rice in Asia. Manila, Philippines: International Rice Research Institute (IRRI). 370p.
Natural resources management ; Water management ; Case studies ; Irrigated rice ; Drying ; Research ; Crop management ; Technology ; Community management ; Irrigation systems ; Nutrient management ; Communication ; Innovation ; Hunger ; Yields ; Stakeholders ; Agricultural extension ; Economic aspects ; Income / Asia / Indonesia / Philippines / Vietnam / China / Myanmar / Sri Lanka / Indo-Gangetic Plains / Mekong River Delta / Red River Delta / North Anhui
(Location: IWMI HQ Call no: 633.18 G570 PAL Record No: H043799)
http://books.irri.org/9789712202599_content.pdf
https://vlibrary.iwmi.org/pdf/H043799.pdf
http://vlibrary.iwmi.org/pdf/H043799_TOC.pdf
https://vlibrary.iwmi.org/pdf/H043799.pdf
http://vlibrary.iwmi.org/pdf/H043799_TOC.pdf
(10.04 MB) (10.0MB)
10 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.
11 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)
12 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)
13 Hoanh, Chu Thai; Suhardiman, Diana; Anh, L. T. 2014. Irrigation development in the Vietnamese Mekong Delta: towards polycentric water governance? International Journal of Water Governance, 2:61-82. [doi: https://doi.org/10.7564/14-IJWG59]
Irrigation development ; Policy making ; Decision making ; Irrigation systems ; Water governance ; Water resources ; Deltas ; Rice ; Crop production ; Farmers ; Aquaculture ; Flood control ; Households ; Income / Vietnam / Mekong River Delta
(Location: IWMI HQ Call no: e-copy only Record No: H046572)
(1.77 MB)
Vietnam’s irrigation development policy directions are divided between the objective to continue increasing rice production through agricultural intensification and to improve farmer’s livelihoods through crop diversification and integrated farming. While the first objective requires the construction of new large-scale irrigation system in deeply flooded area of the Vietnamese Mekong River Delta, the latter demands the modification in management of existing irrigation physical infrastructure for non-rice crops, in particular brackish aquaculture in the coastal zones. This article looks at Vietnam’s irrigation policy formulation processes in the last three and half decades in relation to the idea of polycentric governance. It discusses the current shortcomings and potential role of polycentric governance networks to capture stakeholders’ interests at multiple governance levels essential for future policy development. It partially sheds light on the dark side of water governance, bringing to light the fragmented polycentric decision-making processes in Vietnam’s irrigation development policies.
14 Phong, N. D.; Hoanh, Chu Thai; Tuong, T. P.; Wassmann, R. 2014. Sea level rise effects on acidic pollution in a coastal acid sulphate soil area. In Ames, D.P., Quinn, N.W.T., Rizzoli, A.E. (Eds.). Proceedings of the 7th International Congress on Environmental Modelling and Software, San Diego, California, USA, 15-19 June 2014. Manno, Switzerland: International Environmental Modelling and Software Society (iEMSs) 8p.
Sea level ; Salinity ; Acidity ; Water pollution ; Coastal area ; Acid sulphate soils ; Deltas ; Canals ; Models / Vietnam / Mekong River Delta / Bac Lieu Province
(Location: IWMI HQ Call no: e-copy only Record No: H046614)
http://www.iemss.org/sites/iemss2014/papers/iemss2014_submission_223.pdf
https://vlibrary.iwmi.org/pdf/H046614.pdf
https://vlibrary.iwmi.org/pdf/H046614.pdf
(0.39 MB) (397.30 KB)
Bac Lieu is a coastal province the Mekong River Delta (MRD), Vietnam. Aside from salinity intrusion from the sea, the province is strongly affected by acidic pollution as 58% of the area (250,000 ha) is overlaid with acid sulphate soil (ASS). Previous studies showed that the eminent sea level rise (SLR) would influence the hydrology and salinity of the canal networks in the province. This study, using the previously validated hydraulic and water quality model VRSAP-ACIDITY (Vietnam River Systems And Plains, coupled with ACIDITY Module), aimed at quantifying impacts of different SLR scenarios (SLR = 17, 30, 50, or 75 cm) on acidic pollution in the province. Under the present sea level, widespread acidic pollution (pH < 5) of surface water occurred at the start of the rainy season, due to leaching of acidity from canal embankments and fields in ASS. The acceleration of SLR reduced the area of acidic polluted water. The lessening in acidic pollution was attributed to (1) SLR that raised the water level in the Mekong River, increasing the amount of fresh water flowing into the study area; and (2) the amount of water drained out of the study area increased, bringing with its acidity. It concluded that SLR has a positive effect on acidic pollution in the ASS coastal area.
15 Phong, N. D.; Hoanh, Chu Thai; Tho, T. Q.; van Ngoc, N.; Dong, T. D.; Tuong, T. P.; Khoi, N. H.; Hien, N. X.; Nam, N. T. 2015. Water management for agricultural production in a coastal province of the Mekong River Delta under sea-level rise. In Hoanh, Chu Thai; Johnston, Robyn; Smakhtin, Vladimir. Climate change and agricultural water management in developing countries. Wallingford, UK: CABI. pp.120-134. (CABI Climate Change Series 8)
Water management ; Agricultural production ; Coastal area ; Deltas ; Salinity ; Sea level ; Salt water intrusion ; Climate change ; Water levels ; Flow discharge ; Aquaculture ; Agriculture ; Flooding / Vietnam / Bac Lieu Province / Mekong River Delta
(Location: IWMI HQ Call no: IWMI Record No: H047375)
(2.46 MB)
16 Livsey, J.; Da, C. T.; Scaini, A.; Lan, T. H. P.; Long, T. X.; Berg, H.; Manzoni, S. 2021. Floods, soil and food – interactions between water management and rice production within an Giang Province, Vietnam. Agriculture, Ecosystems and Environment, 320:107589. (Online first) [doi: https://doi.org/10.1016/j.agee.2021.107589]
Flooding ; Soil properties ; Soil fertility ; Water management ; Food production ; Rice ; Intensification ; Sustainability ; Fertilizers ; Rivers ; Sediment / Vietnam / Mekong River Delta / An Giang
(Location: IWMI HQ Call no: e-copy only Record No: H050587)
https://www.sciencedirect.com/science/article/pii/S0167880921002930/pdfft?md5=134ab2211e4a05597b92b19b1399b558&pid=1-s2.0-S0167880921002930-main.pdf
https://vlibrary.iwmi.org/pdf/H050587.pdf
https://vlibrary.iwmi.org/pdf/H050587.pdf
(3.89 MB) (3.89 MB)
Rapid intensification of Vietnamese rice production has had a positive effect on the nation's food production and economy. However, the sustainability of intensive rice production is increasingly being questioned within Vietnam, particularly in major agricultural provinces such as An Giang. The construction of high dykes within this province, which allow for complete regulation of water onto rice fields, has enabled farmers to grow up to three rice crops per year. However, the profitability of producing three crops is rapidly decreasing as farmers increase their use of chemical fertilizer inputs and pesticides. Increased fertilizer inputs are partly used to replace natural flood-borne, nutrient-rich sediment inputs that have been inhibited by the dykes, but farmers believe that despite this, soil health within the dyke system is degrading. However, the effects of the dykes on soil properties have not been tested. Therefore, a sampling campaign was conducted to assess differences in soil properties caused by the construction of dykes. The results show that, under present fertilization practices, although dykes may inhibit flood-borne sediments, this does not lead to a systematic reduction in nutrients that typically limit rice growth within areas producing three crops per year. Concentrations of total nitrogen, available phosphorous, and both total and available potassium, and pH were higher in the surface layer of soils of three crop areas when compared to two crop areas. This suggests that yield declines may be caused by other factors related to the construction of dykes and the use of chemical inputs, and that care should be taken when attempting to maintain crop yields. Attempting to compensate for yield declines by increasing fertilizer inputs may ultimately have negative effects on yields.
17 Ghosh, Surajit; Wellington, Michael; Holmatov, Bunyod. 2022. Mekong River Delta crop mapping using a machine learning approach. Colombo, Sri Lanka: International Water Management Institute (IWMI). CGIAR Initiative on Low-Emission Food Systems (Mitigate+). 11p.
Crops ; Mapping ; Deltas ; Machine learning ; Satellite imagery ; Land use ; Land cover ; Farmland / South East Asia / Vietnam / Mekong River Delta
(Location: IWMI HQ Call no: e-copy only Record No: H051629)
(1.05 MB)
Agricultural land use and practices have important implications for climate change mitigation and adaptation. It is, therefore, important to develop methods of monitoring and quantifying the extent of crop types and cropping practices. A machine learning approach using random forest classification was applied to Sentinel-1 and 2 satellite imagery and satellite-derived phenological statistics to map crop types in the Mekong River Delta, enabling levels of rice intensification to be identified. This initial classification differentiated between broad and prevalent crop types, including perennial tree crops, rice, other vegetation, oil palm and other crops. A two-step classification was used to classify rice seasonality, whereby the areas identified as rice in the initial classification were further classified into single, double, or triple-cropped rice in a subsequent classification with the same input data but different training polygons. Both classifications had an overall accuracy of approximately 96% when cross-validated on test data. Radar bands from Sentinel-1 and Sentinel-2 reflectance bands were important predictors of crop type, perhaps due to their capacity to differentiate between periodically flooded rice fields and perennial tree cover, which were the predominant classes in the Delta. On the other hand, the Start of Season (SoS) and End of Season (EoS) dates were the most important predictors of single, double, or triple-cropped rice, demonstrating the efficacy of the phenological predictors. The accuracy and detail are limited by the availability of reliable training data, especially for tree crops in small-scale orchards. A preliminary result is presented here, and, in the future, efficient collection of ground images may enable cost-effective training data collection for similar mapping exercises.
Powered by DB/Text WebPublisher, from
