Regional rainfall level zoning and an evaluation indicator of rainwater harvesting systems in northern Taiwan

• Main Authors: Ming-cheng Liao, 廖明誠
• Other Authors: Cheng-li Cheng
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/97231679598235006397

博士 === 國立臺灣科技大學 === 建築系 === 97 === Rainwater harvesting systems had been widely accepted as solutions to alleviate the problems of water shortages. The main objective of this study is to construct an effective management framework of rainwater harvesting systems by means of regional rainfall level zoning and an evaluation indicator. First, a rainfall station system based on a point concept was converted to one based on a spatial concept in order to cope with the problems of rainfall data. A two-step cluster analysis was used to classify the sample area into several regions in accordance with rainfall level characteristics and spatial continuity. This rainfall zoning system would contribute to the standardized regional precipitation database for the rainwater harvesting application. Second, a rainwater utilization indicator system was established to extract representative variables and weights, as well as develop a formula for an indicator. Then, acquired scores will show the potentials for discrepancies between different rainwater harvesting systems. This study had also compared the scores and long-term simulated water-savings percentages and constructed an effectiveness evaluation formula for rainwater harvesting systems. Through this indicator system, designers can review the system’s design to adjust the parameters for the optimal system. The proposed rainwater indicator system should be used for reviewing proposals and according to the potential, an optimal design and regulations can be chosen for the most suitable utilization and peak effectiveness of a rainwater harvesting system.