[1]DENG Liqiang,WANG Fei,HAN Jianqiao,et al.Change of Weihe River System and Its Response to Urbanization in Guanzhong Area[J].Research of Soil and Water Conservation,2020,27(04):256-261.
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Change of Weihe River System and Its Response to Urbanization in Guanzhong Area
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 04
Page number:
256-261
Column:
目次
Public date:
2020-06-20
- Title:
- Change of Weihe River System and Its Response to Urbanization in Guanzhong Area
- Keywords:
- water system evolution; urbanization; Weihe River basin; Guanzhong area; remote sensing data
- CLC:
- TV212.5
- DOI:
- -
- Abstract:
- In order to discuss the evolution characteristics and driving mechanism of river system under the background of urbanization, and provide theoretical support for the protection of river system, based on Landsat images in 1990 and 2015, the impact of urbanization on river network and water system evolution was comprehensively analyzed by extracting the Weihe River system in Guanzhong area, selecting 4 indicators including river length, river network density, curvature of main channel and tributary development coefficient, and using land use status map of the same period. The results show that:(1)the length of Weihe River system in Guanzhong section gradually decreased from 4 194.48 km in 1990 to 3 357.8 km in 2015, and its attenuation rate gradually increased with the decrease of river grade; the density of river network decreased from 0.076 km/km2 to 0.061 km/km2;(2)in the period 1995—2015, curvature of main channel of Weihe River decreased from 1.99 to 1.87, development coefficients Ⅱ and Ⅲ tributaries also presented the decreasing trend, and reduction rate of development coefficient of the Ⅲ tributoary was greater than that of Ⅱ tributary;(3)urbanization has a significant impact on the change of river system; the increase rate of urban construction land is significantly positively correlated with the decline rate of river network system; the construction of embankments and river bends reduce the curvature of main stream. In the process of rapid urbanization, the Weihe River network water system show a shrinking trend, the main reason is impact of urbanization. Therefore, it is necessary to strengthen the protection of water system in the process of urbanization. The regulation lines of rivers should be widen and the protection of low-grade watercourses should be strengthened.
- References:
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Last Update:
2020-07-09