基于HEC-GeoHMS模块的青山河子流域划分研究
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摘要
以青山河流域作为研究区域,通过采用ArcGIS结合地理空间水文模型扩展(HEC-GeoHMS)模块,对青山河流域数字高程模型(DEM)数据进行分析,生成数字水系,划分提取子流域。运用AutoCAD根据划分边界在万分之一地形图上量测流域特征值,计算提取成果与量测值相对误差,结果表明,相对误差值在模型计算允许范围以内,结果基本可靠,符合模型计算要求。同时通过统计分析,得出相对误差与流域地形坡度存在一定相关性的结论。通过研究可以确定,相比传统的手工量测,采用HEC-GeoHMS模块,可以使子流域提取与数字水系生成在保证精度的前提下变得更加高效与便捷,并可以为HEC-HMS模型的计算提供数据基础。
The research area of this paper is Qingshan River Basin.By using ArcGIS and HEC-GeoHMS module,the digital elevation model(DEM)data of Qingshan River Basin are analyzed to generate digital water system and extract and divide sub-basins.Using the measured topographic maps to measure the watershed eigenvalues and check the extracted results,the results show that the relative error is within the allowable range of model calculation.At the same time,through statistical analysis,it is concluded that there is a certain correlation between the relative error and the topographic slope of the basin.Through this research,it can be determined that compared with traditional manual measurement,the use of HEC-GeoHMS module can make sub-basin extraction and digital water system generation more efficient and convenient on the premise of ensuring accuracy,and also can provide data basis for the calculation of HEC-HMS model.
The research area of this paper is Qingshan River Basin.By using ArcGIS and HEC-GeoHMS module,the digital elevation model(DEM)data of Qingshan River Basin are analyzed to generate digital water system and extract and divide sub-basins.Using the measured topographic maps to measure the watershed eigenvalues and check the extracted results,the results show that the relative error is within the allowable range of model calculation.At the same time,through statistical analysis,it is concluded that there is a certain correlation between the relative error and the topographic slope of the basin.Through this research,it can be determined that compared with traditional manual measurement,the use of HEC-GeoHMS module can make sub-basin extraction and digital water system generation more efficient and convenient on the premise of ensuring accuracy,and also can provide data basis for the calculation of HEC-HMS model.
引文
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[12]许斌,谢贤健,甄英.基于DEM和分形理论的沱江流域划分及河网提取[J].水电能源科学,2018(7):13-16.
[2]付瑾.基于Arc Hydro Tools的流域水文信息提取——以疏勒河流域为例[J].甘肃水利水电技术,2018(3):11-13.
[3]BHANDARI A K,KUMAR A,SINGH G K.Automatedrecognition of valley lines and drainage networks from grid digital elevation models[J].Journal of Hydrology,1995,167(1):393-396.
[4]杨旭,陈建国,程潭武,等.基于RS与GIS技术的数字流域水体信息的提取[J].水资源与水工程学报,2018(4):81-86.
[5]孔辉,孙增慧,石磊.在ArcGIS软件下利用DEM数据提取流域水系网[J].数字技术与应用,2018(9):76,78.
[6]GARTSMAN B I,SHEKMAN E A.Potential of river network modeling based on GIS technologies and digital elevation model[J].Russian Meteorology and Hydrology,2016,41(1):63-71.
[7]康俊,孙佳,程炳岩.基于Arc Hydro Tools的涪江流域特征自动提取分析[J].西南师范大学学报(自然科学版),2017(6):83-87.
[8]张利敏,廖卫红,殷兆凯,等.基于HEC-HMS模型推求西江流域巨型水库群区间入流[J].中国农村水利水电,2017(6):65-69,73.
[9]王纳纳,唐川,唐宏旭.基于HEC-HMS的水打沟泥石流汇流过程[J].山地学报,2015(3):318-325.
[10]董晓华,杨芝辰,成洁,等.DEM分辨率对小流域设计洪峰推求误差的影响[J].人民长江,2018(6):8-12.
[11]王俊啟.基于1:1万地形图的数字流域划分研究——以浙江省安吉县为例[D].杭州:浙江大学,2013.
[12]许斌,谢贤健,甄英.基于DEM和分形理论的沱江流域划分及河网提取[J].水电能源科学,2018(7):13-16.