甘肃省渭河流域地表水资源量评价研究

Evaluation of Surface Water Resources in the Weihe River Basin in Gansu Province

为了解甘肃省渭河流域地表水资源情况,本文结合甘肃省第三次水资源调查评价,以甘肃省渭河流域109个降水量站、18个蒸发站、19个水文站的1956—2016年系列数据资料为基础,采用分项调查法、累积距平曲线法和Mann-Kendall趋势检验法对流域径流量进行还原与评价研究。结果表明,甘肃省渭河流域降水量自1993年后均呈显著减少趋势,水面蒸发量减少趋势不明显;流域水资源量呈衰减趋势。研究成果可为流域水资源合理配置和利用提供参考。

In order to understand the situation of surface water resources in Weihe River Basin in Gansu Province,in this paper,combined with the third survey and evaluation of water resources in Gansu Province and based on the series data of 109 precipitation stations,18 evaporation stations and 19 hydrological stations in Weihe River Basin in Gansu Province from 1956 to 2016,the runoff of the basin is reconstructed and evaluated through the methods of component investigation,cumulative anomaly curve and Mann-Kendall trend test.The results show that the precipitation above Weihe River Basin has decreased significantly since 1993,but the decreasing trend of evaporation on water surface is not obvious.The amount of water resources in the basin in Gansu Province shows a declined trend.The research results can provide reference for rational allocation and utilization of water resources in the basin.