河流最小生态基础流量计算方法研究  

Study on computational methods for minimum environmental flows

作　　者：张新华[1] 李红霞[1] 肖玉成[1] 赵少华[1] 

机构地区：[1]四川大学水力学与山区河流开发保护国家重点实验室,四川成都610065

出　　处：《中国水利水电科学研究院学报》2011年第1期66-73,共8页Journal of China Institute of Water Resources and Hydropower Research

基　　金：国家科技重大水专项(2008ZX07526-004-T007;2009ZX07212-002-003;2009ZX07104-001);四川大学水力学与山区河流开发保护重点实验室小团队研究基金;四川大学青年教师科研启动基金(2009SCU11079)

摘　　要：为了能够计算几何断面复杂、泥沙淤积、河宽大、水深浅的河道生态基础流量,本文以渭河关中地区的生态基础流量计算为例,通过综合水力学中的湿周法和R2CROSS法建立了一套简单、适合管理的最小生态基础流量方法——综合法。该方法计算出的5个站的生态基础流量占多年平均流量的比值都在10.8%～14.9%之间,满足生态基流的合理要求。通过与Tennant方法比较,结果表明:综合法计算确定的生态基础流量更为合理、是一种在管理上更值得推广应用的方法。In order to determine the minimum ecological flow（MEF） for a river system with special characteristics of complicated river reach profiles,sediment problems,very large width and shallow water depth,an integrated method was proposed to overcome some of limits in using wetted perimeter method and R2CROSS method.A case study was conducted in the Wei River,a tributary of the Yellow River.Results calculated by this integrated method indicate that the MEFs at the five hydrological stations are at a range of 10.8%~14.9% of the multi-year mean flows,respectively.In comparison with Tennant method,therefore,we can get a conclusion that the integrated method is more suitable and reasonable for the determination of MEFs.

关 键 词：生态需水量 湿周法 斜率法 曲率最大法 R2CROSS法 

分 类 号：X171[环境科学与工程—环境科学]