A study of the drainage property of fish ponds during heavy rainfall and its impacts on regional drainage systems
Date Issued
2010
Date
2010
Author(s)
Chan, Tak-Hou
Abstract
Taiwan is frequently hit by typhoons and the southwest air current. It generated heavy rain. If rain during the high tide period, easy to form water intrusion or caused serious disaster especially in low-lying coastal areas. Fish ponds were identified as having the characteristics of flood protection, but for the more detailed research data is not much. Using the local rainfall pattern and tide, analyze the impact of derivation of the pond drainage on the drainage system. In Pingtung, the initial depth of 1.5m over the fish ponds (total 3 meters high), a large volume of water, irrespective of salinity just consider the situation to prevent overflow, the Chiayi area ponds initial average depth is about 1 meter and the dam high about 1.7 meters. The capacity of depth is about 0.2 meters; drainage should be considered when the salinity change. According to the maximum flow time adjusting drainage time, calculate the depth of ponds to be reserved in advance before the arrival of the maximum flow, retention ponds capacity, and increase flood detention effect. Proposed establishment of a central pumping system, the benefits of two points, first, close the downstream floodgate can reduce the tidal effects. Second, the drainage water easy to cross-contamination, if the establishment of a central water supply system, water can be used for water treatment and testing, to ensure water quality.
Subjects
inundation
disaster
fish pond
Drainage system
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