尖山埤水庫集水區洪峯流量與泥砂產量分析

PEAK RUNOFF AND SEDIMENT YIELD FROM SUBWATERSHEDS OF THE JENSANPEI RESERVOIR IN THE SOUTHWESTERN TAIWAN

10.29417/JCSWC.198611_17(2).0009

盧惠生(Hui-Sheng Lu)

集水區 ； 洪峯流量 ； 泥砂量 ； Watershed ； Peak runoff ； Sediment yield

中華水土保持學報

17卷2期（1986 / 11 / 01）

97 - 106

繁體中文

尖山埤水庫年平均淤砂量居本省各水庫淤砂之首位，因而探討水庫上游各小集水區砂源輕重，釐定各小集水區優先治理次序，頗爲重要。本硏究以合理化公式法及通用土壤冲蝕公式修正法從事尖山埤水庫上游各小集水區洪峯流量與泥砂推估，所得結果尙爲合理。各小集水區洪峯流量與集水區面積呈正比，而洪峯比流量與集水區面積呈反比。以相當年平均冲蝕深度而言，泥砂來源較爲嚴重的小集水區依次爲：布袋坑（61.21 mm）、濁水坑（58.25 mm）、尖山坑（55.08mm）、石頭坑（49.42mm）、茄苳坑（38.98mm）、鳥湖坑（30.70mm）。

Compared to the sediment yield from reservoir watersheds in Taiwan, the sedimentation of Jensanpei Reservoir is much more serious. In order to set the priority of treatments for upstream watersheds, the identification of severely eroded subwatersheds is essential. This paper presents runoff and sediment yield from upstream watersheds in Jensanpei Reservoir using rational formula method and modified USLE method. The peak runoff of subwatersheds is positively related to the size of area and the specific peak runoff of subwatersheds is negatively related to the size of area. The estimated sediment yields in average annual depth are in decreasing order: Pu-tai subwatershed (61.21mm), Chuo-shui subwatershed (58.25mm), Chien-shan subwatershed (55.08mm), Shih-tou subwatershed (49.42mm). Chieh-tung subwatershed (38.98mm), Niao-hu subwatershed (30.70mm).