[1]DUAN Qicai,WU Hao,WANG Jie,et al.Study on the Water Conservation Capacity of Urban Catchment Areas in Central Yunnan[J].Research of Soil and Water Conservation,2015,22(05):312-315.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
22
Number of periods:
2015 05
Page number:
312-315
Column:
Public date:
2015-10-28
- Title:
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Study on the Water Conservation Capacity of Urban Catchment Areas in Central Yunnan
- Author(s):
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DUAN Qicai, WU Hao, WANG Jie, ZHANG Lei
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Yunnan Hydraulic Research Institute, Kunming 650228, China
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- Keywords:
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hydrology; water conservation capacity; statistics; water source
- CLC:
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S152.7
- DOI:
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- Abstract:
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Water conservation capacity is the main aspect of water source area protect. Therefore, based on the precipitation and runoff date of Zhonghe, Dayizi, Majiazhuang and Fengtun(Ⅱ) from 1982 to 2011 in Kunming, Yuxi and Chuxiong, MODIS and Landsat remote sensing image, the space-time characteristics and the influence of precipitation, vegetation coverage and land use type were analyzed. The results showed that the total runoff and base flow in Fengtun (Ⅱ) were maximum, and were minimum in Majiazhuang, the different of the two stations were 48% and 70%, respectively. The total runoff and base flow in Dayizi declined significantly (α≥99.6%), the trend of the other station was not significant from 1982 to 2011. The total runoff and base flow had positive linear correlation with precipitation, forest land area ratio (R2≥0.814 4), had negative with garden area ratio (R2=0.687 7), but had no correlation with vegetation coverage, the cultivated land area ratio (R2≤0.379 8). The study showed that the water conservation capacity was the strongest in Jiulongdian and the weakest in Dongfeng. The ability of water conservation had not significant change in Jiulongdian, Songhuaba and Jiuxihe of Dongfeng, but had significantly declined in Dongbinghe of Dongfeng. The increase of precipitation and forest area will be conducive to source self-restraint ability enhancement, the increase of the future area will lead to a drop in water conservation ability, but the vegetation coverage can not reflect the level of water conservation capacity.