Your search found 5 records
1 Chen, D.; Huang, J.; Jackson, T. J. 2005. Vegetation water content estimation for corn and soyabeans using spectral indices derived from MODIS near - and short-wave infrared bands. Remote Sensing of Environment, 98:225-236.
(Location: IWMI-HQ Call no: P 7429 Record No: H037632)
2 Chen, D.; White, R.; Li, Y.; Zhang, J.; Li, B.; Zhang, Y.; Edis, R.; Huang, Y.; Cai, G.; Wei, Y.; Zhu, A.; Hu, K.; Li, G.; Zhu, Z. 2006. Conservation management of water and nitrogen in the North China Plain using a GIS-based water and nitrogen management model and agricultural decision support tool. In Willett, I. R.; Gao, Z. (Eds.) Agricultural water management in China: Proceedings of a workshop held in Beijing, China, 14 September 2005. Canberra, Australia: ACIAR. pp.26-38.
Water conservation ; Irrigated farming ; Nitrogen ; Fertilizers ; Wheat ; Maize ; GIS ; Decision support tools / China / North China Plain
(Location: IWMI-HQ Call no: 631.7 G592 WIL Record No: H039219)
3 Wei, Y.; Chen, D.; Edis, R.; White, R.; Davidson, B.; Zhang, J.; Li, B. 2006. The perspective of farmers on why the adoption rate of water-saving irrigation techniques is low in China. In Willett, I. R.; Gao, Z. (Eds.) Agricultural water management in China: Proceedings of a workshop held in Beijing, China, 14 September 2005. Canberra, Australia: ACIAR. pp.153-160.
Water conservation ; Farmers’ attitudes ; Irrigation water ; Farm surveys / China / Henan Province / Fengqiu County
(Location: IWMI-HQ Call no: 631.7 G592 WIL Record No: H039229)
4 Zhang, P.; Jeong, J.-H.; Yoon, J.-H.; Kim, H.; Wang, S.-Y. S.; Linderholm, H. W.; Fang, K.; Wu, X.; Chen, D.. 2020. Abrupt shift to hotter and drier climate over inner East Asia beyond the tipping point. Science, 370(6520):1095-1099. [doi: https://doi.org/10.1126/science.abb3368]
Climate change ; Arid climate ; Warm season ; Soil moisture ; Droughts ; Air temperature ; Trends ; Observation / East Asia / Mongolia
(Location: IWMI HQ Call no: e-copy only Record No: H050100)
(4.03 MB)
Unprecedented heatwave-drought concurrences in the past two decades have been reported over inner East Asia. Tree-ring–based reconstructions of heatwaves and soil moisture for the past 260 years reveal an abrupt shift to hotter and drier climate over this region. Enhanced land-atmosphere coupling, associated with persistent soil moisture deficit, appears to intensify surface warming and anticyclonic circulation anomalies, fueling heatwaves that exacerbate soil drying. Our analysis demonstrates that the magnitude of the warm and dry anomalies compounding in the recent two decades is unprecedented over the quarter of a millennium, and this trend clearly exceeds the natural variability range. The “hockey stick”–like change warns that the warming and drying concurrence is potentially irreversible beyond a tipping point in the East Asian climate system.
5 Xiao, H.; Tang, Y.; Li, H.; Zhang, L.; Ngo-Duc, T.; Chen, D.; Tang, Q. 2021. Saltwater intrusion into groundwater systems in the Mekong Delta and links to global change. Advances in Climate Change Research, 12(3):342-352. [doi: https://doi.org/10.1016/j.accre.2021.04.005]
Saltwater intrusion ; Groundwater ; Climate change ; Human activity ; Surface water ; Freshwater ; Salinity ; Sea level ; Precipitation ; Pumping ; Wells ; Deltas ; Cyclones / South East Asia / Vietnam / Mekong Delta / Mekong River Basin / Tibetan Plateau
(Location: IWMI HQ Call no: e-copy only Record No: H050591)
https://www.sciencedirect.com/science/article/pii/S1674927821000708/pdfft?md5=84b9faeb3898035203d1bb3899396452&pid=1-s2.0-S1674927821000708-main.pdf
https://vlibrary.iwmi.org/pdf/H050591.pdf
https://vlibrary.iwmi.org/pdf/H050591.pdf
(2.65 MB) (2.65 MB)
In recent decades, changes in temperature, wind, and rainfall patterns of Southeast Asia induced by climate warming in the Tibetan Plateau result in many environmental changes that have serious impacts on the lower reach of the Mekong River basin, a region already battling severe water-related environmental problems such as pollution, saltwater intrusion, and intensified flooding. In the densely populated Mekong Delta located at the mouth of the Mekong River basin in southern Vietnam, the hydrogeological systems have been transformed from an almost undisturbed to a human-impacted state and saltwater intrusion into surface water and groundwater systems has grown to be a detrimental issue recently, seriously threatening freshwater supply and degrading the eco-environment. In this article, the impacts of human activities and climate change (e.g., groundwater over-exploitation, relative sea-level rise, storm surge, changing precipitation and temperature regimes, uncontrolled drainage canals, operation of hydropower dams, and rapid development of aquaculture) on saltwater intrusion into groundwater systems in the Mekong Delta are briefly reviewed. Based on current status of research findings regarding saltwater intrusion and the subsequent groundwater quality degradation under the impacts of human activities and climate change, major knowledge gaps and challenges are identified and discussed, including thickness and permeability of the silt and clay aquitard, present-day highly heterogeneous 3D distribution of saline groundwater zones, dynamic variation of saltwater/freshwater transition zone, and the most effective and economical control measure. To bridge these gaps, future work should: 1) apply environmental isotope techniques in combination with borehole tests to gain detailed hydrogeological information regarding spatial variation of permeability and thickness of the silt and clay aquitard; 2) intensify regular groundwater monitoring and collect as much groundwater samples from multiple hydro-stratigraphic units at different depths as possible to visualize the present-day highly heterogeneous 3D distribution of saline groundwater; 3) develop a series of variable-density coupled groundwater flow and salt transport models representing various scenarios of human activities and climate change for predicting future extent of saltwater intrusion; and 4) identify the dominant factor causing saltwater intrusion and determine the most effective and economical engineering technique to address saltwater intrusion problems in the Mekong Delta.
Powered by DB/Text WebPublisher, from
