水利学报2012，Vol.43Issue(2)：136-142,7.
河网城市不透水面的河流水质响应阈值与尺度效应研究
Threshold and scaling effect of impervious surface impact on stream water quality in city with river networks
摘要
Abstract
Rapid expanding of urban impervious surface in cities with river networks has generated a notable impact on the regional environ-hydrological process. Discussion on the water quality response of impervious surface is of great importance for the regional land use regulation and river management. Considering the special hydroeomorphic characteristics of city with river network, Shanghai was selected as the study area. Based on the 48 water environmental monitoring cross-sections, a serial of buffers in different spatial scale from 100m to 1 500m were established surrounding each cross-section, which would be used as hydro- logical units to detect the scaling effect. It demonstrated that there was a clear non-linear relationship between TIA （Total Impervious Area） percentage and water quality index, and the threshold effect was clearly verified for these indices, with a common threshold （TIA=60%）. However, there was a simple linear relationship and not any threshold effect between TIA percentage and DO （Dissolved Oxygen）. The sudden change of different water quality index was different when TIA exceeded the threshold, especially the pollution of NH3-N and TN were the most. At the same time, the results were also proved that the threshold effect was independent of the scaling.关键词
总不透水面/水环境响应/阈值效应/尺度效应/河网Key words
total impervious area/water quality response/threshold effect/scaling effect/river network分类
资源环境引用本文复制引用
赵军,杨凯,邰俊,钱光人..河网城市不透水面的河流水质响应阈值与尺度效应研究[J].水利学报,2012,43(2):136-142,7.基金项目
国家自然科学基金资助项目 （）
水利部公益性行业专项项目 （）
教育部人文社科研究项目 （）
