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Kết quả tìm kiếm

Danh sách kết quả tìm kiếm tài liệu từ 21 đến 27 trong 27 tài liệu phù hợp.
Tài liệu phù hợp với tiêu chí tìm kiếm:
  • BB

  • Vulnerability assessment of water resources – Translating a theoretical concept to an operational framework using systems thinking approach in a changing climate : Case study in Ogallala Aquifer

    • Tác giả: Kannan, N.; Anandhi, A.;  Người hướng dẫn: -;  Người tham gia: - (2018)

  • The overall objective of this study was to develop a novel tool that can translate a theoretical concept (vulnerability of water resources (VWR)) to an operational framework mainly under altered temperature and precipitation, as well as for population change (smaller extent). The developed application was demonstrated in Kansas (overlying the High Plains region/Ogallala Aquifer, considered the “breadbasket of the world”), using 26 indicators with intermediate level of detail. Our results indicate that the western part of the state is vulnerable from agricultural water use and the eastern part from urban water use. The developed tool can be easily replicated to other regions within and outside the US.
  • BB

  • Policy Analysis of Agricultural Water Fee Collection in China

    • Tác giả: Chen, S.; Wang, Y.;  Người hướng dẫn: -;  Người tham gia: - (2013)

  • The low collection rate of agricultural irrigation water fee is a common problem facing many developing countries, which has also troubled China since the 2000s. In different areas of China, there are two problem-solving strategies: raising water collection rate or exempting water fee. In this paper, we analyze the dilemma of China's agricultural water fee collection from both practical and theoretical perspective. We argue that China will not follow up one single model in agricultural water fee collection and each local government should explore appropriate policy in line with their own situation.
  • BB

  • Supervisory Ability Development and Dual Control Actions of Water Resources

    • Tác giả: Jiang, Y.; Gan, Z.;  Người hướng dẫn: -;  Người tham gia: - (2017)

  • Water is the foundation of survival, the source of civilization and the base of ecology. Water security is significant to the stability and security of a country. In order to make sustainable use of Water Resources, China government aim at " "implementation of water resources consumption and intensity of double control action". Strengthening Water Resources monitoring capacity, more refined and scientific water management, is an important measure to achieve this goal.
  • BB

  • Impacts of Climate Changes on Water Resources in Yellow River Basin, China

    • Tác giả: Lin, Z.; Zhu, Y.;  Người hướng dẫn: -;  Người tham gia: - (2016)

  • This study examined the impacts of future climate changes on water resources and extreme flows in Yellow River Basin (YRB), China, using the Coupled Land surface and Hydrology Model System (CLHMS) driven by the IPCC scenarios RCP 2.6, 4.5 and 8.5. First, the skill of 14 IPCC AR5 GCMS for simulating temporal and spatial temperature and precipitation in Yellow River Basin has been evaluated. Using the bias-corrected result of RCP storylines, the CLHMS model was developed to predict the 21 century climate and water cycle change. All the three simulation results indicate a reduction in water resources. The current situation of water shortage since 1980s will keep continue, the water resources reduction varies between 30 and 24% for RCP 2.6 and 4.5 scenarios. RCP 8.5 scenario simulation ...
  • BB

  • Impact of climate change on water resources of upper Kharun catchment in Chhattisgarh, India

    • Tác giả: Tischbein, B.; Kumar, N.;  Người hướng dẫn: -;  Người tham gia: - (2017)

  • This research aims to assess the impact of climate change on water balance components. Hydrological simulations, performed by SWAT (Soil and Water Assessment Tool), indicate over-proportional runoff-rainfall and under-proportional percolation-rainfall relationships. Simulated annual discharge for 2020s will decrease by 2.9% on average (with a decrease of 25.9% for q1 to an increase by 23.6% for q14); for 2050s an average increase by 12.4% (17.6% decrease for q1 to 39.4% increase for q0). Respective ranges on percolation: for 2020s an average decrease by 0.8% (12.8% decrease for q1 to an increase of 8.7% for q14); for 2050s an average increase by 2.5% (10.3% decrease for q1 to 15.4% increase for q0). These over- and under-proportional relationships indicate future enhancement of floo...
  • BB

  • Impacts of climate change on agricultural water resources and adaptation on the North China Plain

    • Tác giả: Hu, S.; Mo, X.;  Người hướng dẫn: -;  Người tham gia: - (2017)

  • Climate change is having a considerable impact on the availability of water resources for agricultural production on the North China Plain (NCP). Global climate model (GCM) ensemble projections predict that by the 2050s, the increased crop water demand and intensified ET resulting from global warming will reduce water resources surplus (Precipitation–ET) about 4%–24% and increase significantly the irrigation water demand in crop growth periods. This study assesses possible mitigation and adaptation measures for enabling agricultural sustainability. It is revealed that reducing the sowing area of winter wheat (3.0%–15.9%) in water-limited basins, together with improvement in crop water-use efficiency would effectively mitigate water shortages and intensify the resilience of agricultu...
  • LA

  • Integrating water resources modelling and remote sensing in Karkeh River Basin, Iran

    • Tác giả: Verhoef, W.; Muthuwatta, L.P.;  Người hướng dẫn: -;  Người tham gia: - (2014)

  • Thesis provides a brief description of the Karkheh River Basin, including geography, climate, agriculture, hydrology, demography, water management and the data used in this study; presents a literature review on satellite remote sensing and hydrological models applied in water resources management; presents the estimation of water availability and water consumption by the different vegetation classes in the Karkheh River Basin; preference-based multi-variable calibration using streamflow and actual evapotranspiration is described; strategies to improve wheat production in the basin to meet the production targets of 2025 are evaluated.