Related Experiment Video
Updated: Jun 11, 2026

A Protocol for Conducting Rainfall Simulation to Study Soil Runoff
Published on: April 3, 2014
Evaluation of dual-mode rainwater harvesting system to mitigate typhoon-induced water shortage in Taiwan
M M Islam1, F N-F Chou, C-H Liaw
1Department of Hydraulic and Ocean Engineering, National Cheng Kung University, Tainan, Chinese Taiwan. manzurul73@gmail.com
Abstract:
The water shortage of today's world is one of the most challenging problems and the world is looking for the best solution to reduce it. Some human made causes and also natural causes are liable for the shortage of the existing water supply system. In Taiwan, especially during typhoon, the turbidity of raw water increases beyond the treatment level and the plant cannot supply required amount of water. To make the system effective, a couple of days are needed and the shortage occurs. The purpose of this study is to solve this emergency shortage problem. A dual-mode Rainwater Harvesting System (RWHS) was designed for this study as a supplement to the existing water supply system to support some selected non-potable components such as toilet and urinal flushing of an elementary school. An optimal design algorithm was developed using YAS (yield after spillage) and YBS (yield before spillage) release rules. The study result proved that an optimum volume of tank can solve the emergency water shortage properly. The system was found to be more reliable in Taipei area than that of Tainan area. The study also discovered that a government subsidy would be needed to promote the system in Taiwan.
Related Concept Videos
Design Example: Analyzing Capacity Contours for Flood Risk Assessment
Design Example: Design of an Irrigation Channel
Responses to Drought and Flooding
Adaptations that Reduce Water Loss
Conservation of Mass in Moving, Nondeforming Control Volume
In the context of a detention basin, the conservation of mass states that the total mass of water entering the basin must equal the mass leaving the basin plus any accumulation of...
Design Example: Designing a Residential Plumbing System
