宁夏引黄灌区适宜生态需水估算

Estimation of suitable ecological water requirement for Yellow River irrigation area in Ningxia Autonomous Region

为实现黄河水资源的可持续利用,合理配置有限的水资源,在充分掌握相关资料的基础上,对宁夏引黄灌区非农地(荒地)、湖泊湿地、人工防护林、城市以及地质的适宜需水量采用相应的计算方法进行计算并汇总进行分析。结果表明:在现状条件下,平水年份(降水频率50%)灌区周边的适宜生态需水量为11.12亿m3,枯水年份(降水频率75%)灌区周边的适宜生态需水量为12.72亿m3,该成果可为灌区基于生态的水资源合理配置提供科学依据。

The suitable ecological water requirement for Yellow River irrigation area in the Ninxia Autonomous Region is divided into 5 sectors, including the non-agricultural land use, lake and wetland, artificial protection forest, urban and geological environment, to calculate respectively according to relevant methods. The calculation result shows that the total suitable ecological water requirement of the irrigation area is 11.12 × 10^8m^3 in normal year with 50% frequency of precipitation and 12.72 × 10^8m^3 in dry year with 75 % frequency of precipitation under present situation.