Flow Calculation of Water Environmental Capacity Controlling Units in a Small Watershed Based on GIS Technology

• 作者: LIU Chun-xiao WANG Li ZHANG Pei
• 来源期刊: 气象与环境研究：英文版
• 学科: 地球科学
• 关键词: 水环境容量 控制单元 GIS技术 流量计算 小流域 水文分析 监测断面 月径流
• 年，卷（期）: 2012,（3）
• 页码范围: 42-45
• 页数: 4页
• 分类号: P208

摘要

[Objective]We aimed to calculate the flow of controlling units in a small watershed based on GIS technology.[Method] Hydrologic analysis on Qingyi River was conducted by using ArcGIS9.0,and the controlling units with response of water-land were divided according to the river monitoring sections of Xuchang City;considering the wastewater entering the river and the water from its upper reach,the runoff of controlling sections in the driest month(with guarantee rate of 90%) was calculated by means of isoline,runoff coefficient and hydrologic analogy method,and the calculated value of Gaocun Bridge section in Linying was contrasted with the measured value in 2010.[Result]The results showed that the calculated value and measured value of Gaocun Bridge section in Linying in the driest month of 2010 were 6.03 and 5.93 m3/s respectively,with relative error of 1.69%,which revealed that the result of calculated runoff was reasonable.[Conclusion]The way to divide controlling units was reasonable,and the calculation result of runoff was accurate and can meet the precision of water environment capacity calculation.