| Cite this article: | 魏义长,许澍,Shah Jahan Leghari,等.河南省内四大流域边界提取与水系分析[J].灌溉排水学报,0,():-. |
| Yichang Wei,Shu Xu,Shah Jahan Leghari,et al.河南省内四大流域边界提取与水系分析[J].灌溉排水学报,0,():-. |
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| Boundary extraction of the basins and analysis of river system in Henan province |
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Yichang Wei1, Shu Xu1, Shah Jahan Leghari2, Tongchao Wang3, Desheng Zhu1, Shaoye Wang1
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1.College of Surveying and Geo-informatics,North China University of Water Resources and Electric Power,Zhengzhou;2.College of Land Science and Technology,China Agricultural University,Beijing;3.College of Agronomy,Henan Agricultural University,Zhengzhou
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| Abstract: |
| 【Background】Mapping the boundary and analyzing river distribution characteristics of the basins are critically important for managing and conserving water resources. 【Methods】Based on the digital elevation model (DEM) data, this study used ArcHydro tools, an extension module of ArcGIS, to extract basin boundary and the river systems of the Yangtze River, the Yellow River, the Huaihe River, and the Haihe River in Henan province. 【Results】Results showed that the biggest basin area in Henan province is the Huai river basin (52.2% of the whole province area), in turns are the Yellow River basin (21.9%) and the Yangtze River basin (16.7%), whereas, the smallest occupied area is the Haihe River basin (9.2%). Furthermore, the Huaihe River basin has the highest river network density (0.068km/km2), followed by the Yangtze River basin (0.056km/km2), the Yellow River Basin (0.052km/km2) in western Henan province and the Haihe River Basin (0.045km/km2). The lowest density of the river network is the Yellow River basin (0.036km/km2) in the northeast of Henan province. Although some districts (Zhengzhou city, Kaifeng city, etc.) along the Yellow River do not belong to the Yellow River basin according to the nature of the river basin, their production and domestic water mainly depend on the Yellow River. 【Conclusions】Therefore, the impact of the Yellow River on Henan province is not only limited to the basin, but also on the Huaihe River basin, Henan province should pay more attention to the protection and effective utilization of the Yellow River. |
| Key words: Hydrological analysis; Henan province, Digital elevation model (DEM); Basin boundary；River system |
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