[Distribution of virtual water of crops in Beijing].
Virtual water content of grains and vegetables in Beijing's districts is calculated and analyzed for many years by irrigating water quota method, which is compared with the distribution and exploitation of groundwater in Beijing. The results indicate the virtual water content of grains shows a downward trend in all the districts, but the grain production in Yanqing district brings great pressure to the local groundwater. Secondly, the virtual water content of vegetables shows an upward trend in Shunyi District, Daxing district and Pinggu District and is accounting for more and more gradually. Thirdly, the total virtual water volume of grains is decreasing, and the total virtual water volume of vegetables is increasing and the total virtual water volume of crops in Beijing is reducing in recent years, which corresponds with the structural adjustment of policies.
Wang
Hong-Rui
HR
Key Laboratory for Water and Sediment Sciences, Ministry of Education, College of Water Sciences, Beijing Normal University, Beijing 100875, China. henryzsr@bnu.edu.cn
Dong
Yan-Yan
YY
Wang
Jun-Hong
JH
Wang
Yan
Y
Han
Zhao-Xing
ZX
D002681:China; D003247:Conservation of Natural Resources; D018556:Crops, Agricultural / Q000254:growth & development* / Q000378:metabolism; D005523:Food Supply / Q000191:economics; D014872:Water Movements; D014881:Water Supply / Q000032:analysis* / Q000191:economics