基于地理信息技术和SWAT模型的城市水资源评价方法研究

Urban water resources investigation based on geographic information technology and SWAT model

本文提出一种基于无人机遥感技术以及SWAT模型的地理信息技术与水文模型结合的水资源量调查方法.该方法通过外业调查获取精确地表水分布,结合三调下垫面数据采用水文模型计算考虑地下水和重复水量的水资源总量.将该方法应用于河网水系复杂的平原城市区域,以邳州市为实例对象,验证调查成果的合理性和精度,并基于调查成果研究邳州市水资源特性.结果表明,该方法相较传统方法考虑因素更加全面,不确定性更小,可为平原城市水资源调查提供参考.

The accurate survey is of great significance to water resources in terms of efficient utilization,ecological environment protection and resource management.However,most of the current water resource investigation researches were based on high-resolution satellite data,which cannot meet the accuracy requirement for survey of water resources in underlying surface of complex plain urban region.Here,an investigation method is proposed for water resources quantity,which is based on UAV(unmanned aerial vehicle)remote sensing,SWAT model and geographic information technology.In this method,the accurate distribution of surface water can be obtained by field investigation,and the total quantity of water resource including groundwater and duplicated amount between surface water and groundwater are estimated by the hydrological model with underlying surface data from the third National Land Survey.Then this method is applied to a plain city of Pizhou,where the river network is complex,to verify its feasibility and accuracy as well as analyze Pizhou s water resource characteristics.The results illustrate that,compared to conventional approaches,the proposed method considers more factors and has less uncertainty,thus can provide a highly reliable methodology for urban water resources investigation.