Your search found 5 records
1 Müller, D. 2004. From agricultural expansion to intensification: Rural development and determinants of land-use change in the central highlands of Vietnam. Eschborn, Germany: GTZ. 72p.
Rural development ; Indicators ; Agricultural development ; Land use ; Policy ; Economic growth / Vietnam / Dak Lak
(Location: IWMI-HQ Call no: 338.9 G784 MUL Record No: H035244)
2 Viossanges, Mathieu; Pavelic, Paul; Hoanh, Chu Thai; Vinh, B. N.; Chung, D. T.; D’haeze, D.; Dat, L. Q. 2019. Linkages between irrigation practices and groundwater availability: evidence from the Krong Buk Micro-Catchment, Dak Lak - Vietnam. Contribution to WLE project - Sustainable Groundwater. Final technical report. Colombo, Sri Lanka: International Water Management Institute (IWMI). 65p.
Groundwater assessment ; Water availability ; Irrigation practices ; Irrigation methods ; Sprinkler irrigation ; Basin irrigation ; Catchment areas ; Water resources ; Agricultural practices ; Irrigation efficiency ; Aquifers ; Groundwater table ; Water levels ; Water balance ; Pumping ; Water extraction ; Stream flow ; Groundwater recharge ; Forecasting ; Land use ; Soil moisture ; Farmers ; Techniques / Vietnam / Dak Lak / Krong Buk Micro-Catchment
(Location: IWMI HQ Call no: e-copy only Record No: H049493)
(5.22 MB) (5.22 MB)
3 Pavelic, Paul; Hoanh, Chu Thai; D’haeze, D.; Vinh, B. N.; Viossanges, Mathieu; Chung, D. T.; Dat, L. Q.; Ross, A. 2022. Evaluation of managed aquifer recharge in the Central Highlands of Vietnam. Journal of Hydrology: Regional Studies, 44:101257. [doi: https://doi.org/10.1016/j.ejrh.2022.101257]
Aquifers ; Groundwater recharge ; Groundwater management ; Highlands ; Climate resilience ; Groundwater level ; Rain ; Runoff ; Water quality ; Monitoring ; Water storage ; Irrigation water ; Pilot projects ; Farmers' attitudes / South East Asia / Vietnam / Dak Lak / Krong Buk
(Location: IWMI HQ Call no: e-copy only Record No: H051505)
https://www.sciencedirect.com/science/article/pii/S2214581822002701/pdfft?md5=ae17cef0a645b5ec39430f2c3407c1e6&pid=1-s2.0-S2214581822002701-main.pdf
https://vlibrary.iwmi.org/pdf/H051505.pdf
https://vlibrary.iwmi.org/pdf/H051505.pdf
(7.11 MB) (7.11 MB)
Study region: Dak Lak province in the Central Highlands of Vietnam
Study focus: Intensification of agriculture has resulted in unsustainably high levels of groundwater use in the Central Highlands. High monsoonal rainfall provides opportunities to boost groundwater storage through managed aquifer recharge (MAR), yet experience with MAR in the region is absent. In response, five farm-scale pilots were implemented in collaboration with local farmers whereby runoff from roofs and fields was recharged into shallow dug wells. The pilots were closely monitored over three years.
New hydrological insights for the region: MAR pilots exhibited large contrasts in performance, with volumes recharged ranging from 5 to 530 m3 per year. Pilot sites with cleaner roof runoff water performed best, whilst those using more turbid water from unpaved roads performed worst. Water quality analyses did not identify parameters of major concern for irrigation. Field data and modelling indicate that the size of the recharge water plumes are small relative to the high groundwater velocities making the recharge water difficult to recover from the recharge well in this setting. Water is however contained locally, providing potential for improved water availability within the local area. Farmer attitudes towards MAR vary in response to the technical performance and a range of socioeconomic factors. These findings may provide insights for researchers or practitioners from other regions where groundwater dependence is high but experience in MAR is lacking.
Study focus: Intensification of agriculture has resulted in unsustainably high levels of groundwater use in the Central Highlands. High monsoonal rainfall provides opportunities to boost groundwater storage through managed aquifer recharge (MAR), yet experience with MAR in the region is absent. In response, five farm-scale pilots were implemented in collaboration with local farmers whereby runoff from roofs and fields was recharged into shallow dug wells. The pilots were closely monitored over three years.
New hydrological insights for the region: MAR pilots exhibited large contrasts in performance, with volumes recharged ranging from 5 to 530 m3 per year. Pilot sites with cleaner roof runoff water performed best, whilst those using more turbid water from unpaved roads performed worst. Water quality analyses did not identify parameters of major concern for irrigation. Field data and modelling indicate that the size of the recharge water plumes are small relative to the high groundwater velocities making the recharge water difficult to recover from the recharge well in this setting. Water is however contained locally, providing potential for improved water availability within the local area. Farmer attitudes towards MAR vary in response to the technical performance and a range of socioeconomic factors. These findings may provide insights for researchers or practitioners from other regions where groundwater dependence is high but experience in MAR is lacking.
4 Tran, T. V.; Bruce, D.; Huang, C.-Y.; Tran, D. X.; Myint, S. W.; Nguyen, D. B. 2023. Decadal assessment of agricultural drought in the context of land use land cover change using MODIS multivariate spectral index time-series data. GIScience and Remote Sensing, 60(1):2163070. [doi: https://doi.org/10.1080/15481603.2022.2163070]
Agriculture ; Drought ; Land use ; Land cover ; Moderate resolution imaging spectroradiometer ; Evapotranspiration ; Vegetation ; Multivariate analysis ; Soil moisture ; Dry season ; Meteorological stations ; Farmland / Vietnam / Kon Tum / Gia Lai / Dak Lak / Dak Nong / Lam Dong
(Location: IWMI HQ Call no: e-copy only Record No: H051546)
https://www.tandfonline.com/doi/epdf/10.1080/15481603.2022.2163070?needAccess=true&role=button
https://vlibrary.iwmi.org/pdf/H051546.pdf
https://vlibrary.iwmi.org/pdf/H051546.pdf
(14.40 MB) (14.4 MB)
Using a multivariate drought index that incorporates important environmental variables and is suitable for a specific geographical region is essential to fully understanding the pattern and impacts of drought severity. This study applied feature scaling algorithms to MODIS time-series imagery to develop an integrated Multivariate Drought Index (iMDI). The iMDI incorporates the vegetation condition index (VCI), the temperature condition index (TCI), and the evaporative stress index (ESI). The 54,474 km2 Vietnamese Central Highlands region, which has been significantly affected by drought severity for several decades, was selected as a test site to assess the feasibility of the iMDI. Spearman correlation between the iMDI and other commonly used spectral drought indices (i.e. the Drought Severity Index (DSI–12) and the annual Vegetation Health Index (VHI–12)) and ground-based drought indices (i.e. the Standardized Precipitation Index (SPI–12) and the Reconnaissance Drought Index (RDI–12)) was employed to evaluate performance of the proposed drought index. Pixel-based linear regression together with clustering models of the iMDI time-series was applied to characterize the spatiotemporal pattern of drought from 2001 to 2020. In addition, a persistent area of LULC types (i.e. forests, croplands, and shrubland) during the 2001–2020 period was used to understand drought variation in relation to LULC. Results suggested that the iMDI outperformed the other spectral drought indices (r > 0.6; p < 0.005). The analysis revealed an increase in drought risk in some provinces of the Central Highlands including Gia Lai, Kon Tum, and Dak Lak. It was also found that changes in LULC patterns could minimize (reforestation) or exacerbate (deforestation) the impacts of drought. Our study suggests that applying a multivariate drought index enables a better understanding of drought patterns at the local scale. This provides valuable information for the development of appropriate land and environmental management practices that can affect and mitigate climate change effects.
5 Lan, L.; Mushtaq, S.; Wang, Q. (J.); Barlis, A.; Deniau, A.; Byrareddy, V. M.; Anh, H. T.; Swaans, K. 2024. Are Vietnamese coffee farmers willing to pay for weather index insurance?. International Journal of Disaster Risk Reduction, 100:104185. [doi: https://doi.org/10.1016/j.ijdrr.2023.104185]
Coffee ; Farmers ; Willingness to pay ; Weather index insurance ; Contingent valuation ; Climate change adaptation ; Risk ; Extreme weather events ; Crop insurance ; Developing countries ; Rainfall / Vietnam / Lam Dong / Dak Lak
(Location: IWMI HQ Call no: e-copy only Record No: H052449)
https://www.sciencedirect.com/science/article/pii/S2212420923006659/pdfft?md5=e25434daec9092837c94e431f542cc1f&pid=1-s2.0-S2212420923006659-main.pdf
https://vlibrary.iwmi.org/pdf/H052449.pdf
https://vlibrary.iwmi.org/pdf/H052449.pdf
(1.19 MB) (1.19 MB)
Global coffee production experiences detrimental impacts of climate change. Weather index insurance (WII) offers an opportunity for coffee farmers to mitigate the climate risks in production and motivate them to adopt sustainable farming practices. This study explores Vietnamese farmers' willingness to participate and pay for WII schemes for coffee. A contingent valuation survey was employed on a sample of 151 farmers from the two largest coffee production areas: Lam Dong and Dak Lak provinces. The findings revealed that farmers are willing to pay, on average, US$92.30 per policy for a premium on insurance products. We also found that farmers in Lam Dong are willing to pay more than those in Dak Lak despite fewer Lam Dong farmers being willing to participate in the insurance schemes. The majority of farmers prefer drought to be insured within 3 months of coffee blossom, from February to April. Factors influencing farmers' decision to join the insurance schemes include education, farm size, climate change perception and experiences, and insurance knowledge. The study suggests that the current coffee industry co-contribution to insurance premiums could potentially be reduced by up to 90 %. However, caution must be taken when adjusting co-contribution, as farmers' willingness to pay is heterogeneous. In addition, raising awareness of the impact of climate change on crop production and insurance knowledge training is critical to ensure an increased number of participants in the schemes. The recommendations from this study will contribute to improving the design of coffee insurance products that are tailored to local needs and preferences and will assist in upscaling the products’ outreach in the Coffee Climate Protection Insurance Program.
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