One of the challenges in urban stormwater management is to identify a suitable stormwater management method which will be socially, technologically and economically viable. In this paper, a study on the effectiveness of decentralized and interconnected percolation ponds as a stormwater harvesting technology, for a partially urbanized (semi-urban) catchment is presented. When applied to a case study region in Katpadi, Tamil Nadu, the results were encouraging. The investment required for implementing the proposed stormwater harvesting came to be about ₹555 Million for Option I and ₹714 Million for Option II. The annual volume of water that can be added to the groundwater system through infiltration from the ponds was found to be 1.22 Mm³ in the case of Option I and 0.74 Mm³ in the case of Option II. The percentage area under stormwater harvesting for the entire catchment was found to be 6.14% under Option I and 9.36 under Option II. The hydrologic performance of the proposed stormwater harvesting system indicated that for peak runoff values Option II is more efficient (in terms of minimizing runoff volume) compared to Option I; however, for daily rainfall values, Option I is hydrologically more efficient when compared to Option II.

在城市雨水管理中的挑战之一是确定一种合适的雨水管理方法，该方法在社会，技术和经济上都是可行的。在本文中，对分散和相互连接的渗滤池作为雨水收集技术对部分城市化（半城市）集水区的有效性进行了研究。当应用于泰米尔纳德邦Katpadi的案例研究区域时，结果令人鼓舞。方案I实施拟议的雨水收集所需的投资约为5.55亿卢比，方案II约为7.14亿卢比。通过选项I可以通过池塘渗入增加到地下水系统中的年水量为1.22 Mm ³（对于方案I）和0.74 Mm ³对于备选方案II。在方案一下，整个集水区的雨水收集面积百分比为6.14％，在方案二下为9.36％。拟议中的雨水收集系统的水文性能表明，与方案一相比，方案二的峰值径流值更有效（就径流量的最小化而言）。但是，对于每日降雨值，与方法II相比，方法I在水文效率上更高。