圖書典藏及影音數位平台

水庫集水區之違規開發，將加劇水庫淤積情形，在土地利用管理首重防範於未然。由於曾文水庫集水區幅員廣大，透過衛星影像變異點辨識與查勘，以及現地定期道路巡查，在發現疑似違規開發行為時，可即時通報權責機關查處，預防違規開發行為擴大，並確保執行相關水土保持與復原工作。同時，依據「水質水量保護執行巡查作業注意事項」，為強化水質水量保護區之保護，亦應辦理保護區之年度巡查作業。

1. Objective Zengwen Reservoir watershed is a wide, hilly, rainy and geologically fragile area, with intensive rainfall during wet seasons. The fast-growing economy also increases the rate of developments within Zengwen Reservoir watershed. After Typhoons, the heavy rain triggered landslides and debris flow thus brought the rocks and muds into the reservoir. Those massive mud and sand deposition shall decrease the function and ultimate life of reservoir. Therefore, integral applications of satellite images and periodical ground patrol are used to finding out the illegal land use and the landslides caused by nature disasters. 2. Satellite image processing and analysis Satellite image Formosat-2 or SPOT6/7 satellite images are used in this project. There are 8 satellite images (cloud ratio less than 20%) obtained during of this execution. 3. The periodical road patrol in reservoir watershed (1)Vegetation change detection of satellite image The purpose of satellite image vegetation change detection can reduce the works of ground patrol. The field investigations can be focused on the vegetation change area and avoid the unnecessary investigations.A total number of 166 vegetation change area are investigated in this project. There were 11 suspected illegal events reported to the administrations, and 3confirmed illegal. (2)Monthly road patrol The monthly road patrol contains the roads that higher than the class of country road. There are 18 paths in monthly road patrol. 4. Data compilation and review over the years There were a total number of 1346 vegetation change area are investigated in this project.