Jiang Zhi-Hui, Liao Yun-Jie, Xie Wen-Xia, Li Jia, Fang Zhi-da, Zhao Hong-Tao, Li Xu-Yong
College of Environmental Science and Engineering, Qingdao University, Qingdao 266071, China.
State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
Huan Jing Ke Xue. 2020 Oct 8;41(10):4599-4606. doi: 10.13227/j.hjkx.202003221.
Determining the influence of pervious/impervious underlying surface pattern (composition, position, proportion, etc.) on the generation capacity of surface runoff and pollution in the urban parcel-based catchment could aid in alleviating the urban waterlogging and control non-point source pollution significantly. Landscape metrics were used to analyze the relationship between the characteristics of pervious/impervious underlying surface pattern and total runoff () and the cumulative load of dissolved pollutants () and particulate pollutants (). The results showed that: ① For the metrics of fragmentation, the patch density (PD) was positively correlated with and . and largest patch index (LPI) was negatively correlated with them. Especially, the PD exhibited a significantly positive correlation with (=0.59, <0.05, calculated in COD). However, the LPI exhibited a significantly negative correlation with (=-0.60, <0.05, calculated in COD). ② For the metrics of complexity, landscape shape index (LSI) was positively correlated with and , and mean shape index (MSI) was negatively correlated with them. Especially, the LSI exhibited a significantly positive correlation with (=0.61, <0.05, calculated in TP) significantly. However, the MSI exhibited a significantly negative correlation with (=-0.62, <0.01, calculated in TP) significantly. ③ For the metrics of vergence, the split index (SPLIT) was positively correlated with and , and the cohesion index (COHESION) was negatively correlated with them. The COHESION exhibited a significantly negative correlation with (=-0.59, <0.05, calculated in COD), whereas the SPLIT exhibited a significantly positive correlation with (=0.6, <0.05, calculated in COD). ④ In the planning on the distribution and pattern of pervious surface under small-scale catchment, it is suggested that the scattered small-regular patches should be transformed to large-irregular patches or patch group. The relationship of the fragmentation, complexity, and vergence of pervious/impervious surface, with the runoff generation, and pollution output in parcel-based catchment was analyzed, which provided a new method for rainfall runoff and pollution control by considering rational allocation of LID facilities in terms of its pattern characteristics (area, distance, shape, etc.).
确定透水/不透水底层表面格局（组成、位置、比例等）对城市地块集水区地表径流产生能力和污染的影响，有助于缓解城市内涝并显著控制面源污染。景观指标用于分析透水/不透水底层表面格局特征与总径流量（）以及溶解污染物（）和颗粒污染物（）的累积负荷之间的关系。结果表明：①对于破碎度指标，斑块密度（PD）与和呈正相关，最大斑块指数（LPI）与它们呈负相关。特别是，PD与（=0.59，<0.05，以化学需氧量计算）呈显著正相关。然而，LPI与（=-0.60，<0.05，以化学需氧量计算）呈显著负相关。②对于复杂度指标，景观形状指数（LSI）与和呈正相关，平均形状指数（MSI）与它们呈负相关。特别是，LSI与（=0.61，<0.05，以总磷计算）呈显著正相关。然而，MSI与（=-0.62，<0.01，以总磷计算）呈显著负相关。③对于聚集度指标，分割指数（SPLIT）与和呈正相关，凝聚度指数（COHESION）与它们呈负相关。COHESION与（=-0.59，<0.05，以化学需氧量计算）呈显著负相关，而SPLIT与（=0.6，<0.05，以化学需氧量计算）呈显著正相关。④在小尺度集水区透水表面分布和格局规划中，建议将分散的小规则斑块转变为大不规则斑块或斑块组。分析了透水/不透水表面的破碎度、复杂度和聚集度与地块集水区径流产生和污染输出的关系，这通过考虑低影响开发设施在其格局特征（面积、距离、形状等）方面的合理配置，为降雨径流和污染控制提供了一种新方法。
