Preliminary Research on the Drainage Structure andConnectivity of the Plateau Area: A Case Study of Dianchi Lake

JIN Dong, ZHANG Yu-rong, CHEN Gang, GU Shi-xiang, LI You-yang

Journal of Changjiang River Scientific Research Institute ›› 2016, Vol. 33 ›› Issue (11) : 116-121.

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Journal of Changjiang River Scientific Research Institute ›› 2016, Vol. 33 ›› Issue (11) : 116-121. DOI: 10.11988/ckyyb.20160808
HYDROLOGY AND WATER RESOURCES

Preliminary Research on the Drainage Structure andConnectivity of the Plateau Area: A Case Study of Dianchi Lake

  • JIN Dong1, ZHANG Yu-rong1, CHEN Gang1,2, GU Shi-xiang1, LI You-yang1
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Abstract

According to the 1∶10 000 topographic map in 2000 and the Strahler river classification, the spatial-dimensional features of Dianchi Lake basin which belongs to plateau mountainous area and its differences with coastal plain river network were analyzed based on GIS platform from aspects of drainage pattern,river density, river system complexity and drainage connectivity. Moreover, the influences of water conservancy projects on the regional river structure and function were evaluated, and an evaluation index F based on connectivity connotation was proposed and applied to the basin. Results showed that 1) the river structure in Dianchi Lake basin conforms with Horton law, and the difference of drainage pattern in spatial dimension is not significant; 2) compared with those of coastal areas, the drainage density is low in the basin, and the drainage development degree is not high; 3) reservoir projects increase the rate of water surface and storage capacity in the basin, which can be reflected well by the Hurst index; 4) the evaluation index F could well reflect the role of projects in basin connectivity.

Key words

plateau area / drainage structure / GIS technology / connectivity / Dainchi Lake basin

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JIN Dong, ZHANG Yu-rong, CHEN Gang, GU Shi-xiang, LI You-yang. Preliminary Research on the Drainage Structure andConnectivity of the Plateau Area: A Case Study of Dianchi Lake[J]. Journal of Changjiang River Scientific Research Institute. 2016, 33(11): 116-121 https://doi.org/10.11988/ckyyb.20160808

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