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- W2384669924 abstract "According to the rainfall-runoff-evapotranspiration and the balance model of water resources supply and demand,some results are obtained as follows.(1) The annual mean amount of water resources in Beijing declined from 37.39×108 m3 to 22.33×108 m3 in 2009,a decrease of about 40.1%,which is due to climate factors(contribution rate of 30.1%) and land cover changesd induced by human activities(69.9%).(2) In recent years,the precipitation in Beijing was 485.5 mm.The evapotranspiration(during the period 2001-2009) calculated by models based on different underlying surface types was 494 mm.The amount of runoff in rivers was 46 mm.The inflow was 4.34×108 m3 and the outflow was 8.03×108 m3.The volume of groundwater overdraft,net reservoir supplies and intake water resources were totally 6.19×108 m3.(3) Without regard to the eco-water demand,the present water shortage in Beijing reaches 4.73~5.85 million m3.By 2014,with the water of the Middle Route of the South-to-North Water Transfer Project arriving in Beijing,the water supply and demand balance will be ensured for 10~15 years on the condition of 75% inflowing water frequency.But if Beijing encounters 95% inflowing water frequency of extremely dry years,it will still face serious water shortages." @default.
- W2384669924 created "2016-06-24" @default.
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- W2384669924 date "2012-01-01" @default.
- W2384669924 modified "2023-09-24" @default.
- W2384669924 title "Research on water resources and water balance in Beijing" @default.
- W2384669924 hasPublicationYear "2012" @default.
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