圖書典藏及影音數位平台

近年來高屏溪流域由於氣候變遷、地震及颱洪作用，防汛期間發生之颱風豪雨事件頻傳，導致山坡地產生大量的土石崩塌，一般而言，豪雨屬於天然災害，而土石崩落屬於自然現象，而新崩落的土石與河道原有淤積的土砂，會經由地表逕流進入下游河道，土石所經之處易造成災害，對河川輸砂特性及穩定性亦造成極大影響。 近年本局及縣市政府於高屏溪流域積極辦理疏濬工程，使轄區內之土砂環境有顯著改善災害發生機率。惟疏濬作業及疏濬後之河道演變可能影響防洪安全及自然環境，因此有必要針對高屏溪流域疏濬成效加以分析評估，並檢討各項水理、沖淤變化及防洪安全等，以達到防洪工程減災興利及河床穩定之目標。 爰此，102年6月7日由高屏溪流域管理委員會之「高屏溪流域管理委員會第39次委員會議」中，決議評估每年清疏成效部分，請本局每年做整體評估，並於高屏溪流域管理委員會每年第一季委員會議中，提出前一年疏濬執行成果及評估結果之專案報告，爰提出本計畫。

In recent years, the Seventh River Management Office and county/city governments have actively conducted dredging projects in the Gaoping River basin. These efforts have significantly improved the sediment environment within the jurisdiction of the Seventh River Management Office, reducing the probability of disasters. However, dredging operations and post-dredging channel changes may affect flood prevention safety and the natural environment. Therefore, it is necessary to analyze and evaluate the effectiveness of dredging in the Gaoping River basin. This assessment should review various hydrological aspects, erosion and sedimentation changes, and flood prevention safety measures to achieve the goal of disaster reduction, promotion of benefits through flood prevention engineering, and the stabilization of riverbeds.