以中国兰州市某校区为例,借助雨洪管理-地理信息系统(stormwater management model with geographic information system,SWMM-GIS)模型对该片区在不同重现期降雨条件下,对绿色屋顶和透水铺装的雨水径流控制效果进行模拟.针对地表高程...以中国兰州市某校区为例,借助雨洪管理-地理信息系统(stormwater management model with geographic information system,SWMM-GIS)模型对该片区在不同重现期降雨条件下,对绿色屋顶和透水铺装的雨水径流控制效果进行模拟.针对地表高程落差较大,管段埋设坡度较大等特点,分析有特殊地形的区域在低影响开发(low impact development,LID)前后,对历时长/短、强降雨的处理效果及可能相关的因素.结果表明,LID设施对节点积水量的控制率随重现期的增加而减弱;在坡度较小、渗透能力良好(包括LID设施的渗透能力)的区域,对中、小重现期降雨形成的径流有较好的改善效果.对坡度较大,并添加透水铺装的子汇水区及邻近的雨水检查井进行局部LID性能分析,发现在特定降雨条件下,LID设施最大入渗量所在时段与最大降雨量的时段可基本重合.研究成果可为水利部门及科研机构探究LID设施性能,以及中国许多城市旧城改造中内涝问题的解决等方面提供参考.展开更多
This paper will discuss the actual erosion estimation of the Patria Nueva micro basin in tons/ha/year (E), located in Tuxtla Gutiérrez Chiapas, Mexico. We used the universal soil loss equation (USLE), considered ...This paper will discuss the actual erosion estimation of the Patria Nueva micro basin in tons/ha/year (E), located in Tuxtla Gutiérrez Chiapas, Mexico. We used the universal soil loss equation (USLE), considered one of the best theoretical tools for planning and soil preservation in the USA and other countries. The actual erosion rates were estimated for 5, 20, 50, 100, and 500 years return periods (Rp), with elevated results due to high degrees of anthropogenic alteration of the micro-basin, especially in the last 50 years. High erosion rates generate the following problems: loss of soil, which is unfavorable for plant life, due to the soil being a non-renewable resource, the undermine can never renovate, the hydraulic area in the main channel reduces during the rainy season (when the river overflows). The sediment accumulates at the lower part of the micro-basin along with waste, garbage, and mud.展开更多
文摘以中国兰州市某校区为例,借助雨洪管理-地理信息系统(stormwater management model with geographic information system,SWMM-GIS)模型对该片区在不同重现期降雨条件下,对绿色屋顶和透水铺装的雨水径流控制效果进行模拟.针对地表高程落差较大,管段埋设坡度较大等特点,分析有特殊地形的区域在低影响开发(low impact development,LID)前后,对历时长/短、强降雨的处理效果及可能相关的因素.结果表明,LID设施对节点积水量的控制率随重现期的增加而减弱;在坡度较小、渗透能力良好(包括LID设施的渗透能力)的区域,对中、小重现期降雨形成的径流有较好的改善效果.对坡度较大,并添加透水铺装的子汇水区及邻近的雨水检查井进行局部LID性能分析,发现在特定降雨条件下,LID设施最大入渗量所在时段与最大降雨量的时段可基本重合.研究成果可为水利部门及科研机构探究LID设施性能,以及中国许多城市旧城改造中内涝问题的解决等方面提供参考.
文摘This paper will discuss the actual erosion estimation of the Patria Nueva micro basin in tons/ha/year (E), located in Tuxtla Gutiérrez Chiapas, Mexico. We used the universal soil loss equation (USLE), considered one of the best theoretical tools for planning and soil preservation in the USA and other countries. The actual erosion rates were estimated for 5, 20, 50, 100, and 500 years return periods (Rp), with elevated results due to high degrees of anthropogenic alteration of the micro-basin, especially in the last 50 years. High erosion rates generate the following problems: loss of soil, which is unfavorable for plant life, due to the soil being a non-renewable resource, the undermine can never renovate, the hydraulic area in the main channel reduces during the rainy season (when the river overflows). The sediment accumulates at the lower part of the micro-basin along with waste, garbage, and mud.
