圖書典藏及影音數位平台

本計畫擬於113年度施作2次水庫全水域淤積測量工作；分別預定於汛期前(原則5月)及汛期末（原則10月）辦理，並進行水庫容積計算。另水庫淤積測量之水面上係以空載光達（LiDAR）技術量測地表點；水面下係以測深儀量測水深，需製作庫區數值地形圖、數值高程模型（DEM）及水庫容積計算等，量測範圍為EL.235公尺並再往外推100公尺水平範圍，並應涵蓋水庫兩旁台3線道路。

TsengWen Reservoir build in upstream of TsengWen River. The main objective is regulation and making full use of water resources of TsengWen River. TsengWen Reservoir not only works to improve and expand of irrigated farmland in Chianan region, but also possesses with hydroelectric power, water supply system and flood control, etc. The large amount of sediment was transposed to storage from the reservoir by flood since it has been storaged and through several typhoons and heavy rain. This situation will result unfavorable effect on the operation of the reservoir. In order to execute silt dredging and watershed management effectively, so this plan uses Airborne-LIDAR and Multibeam echosounder to conduct data collection, which are with high accuracy and high density. According to the result of analysis of erosion and siltation, this plan becomes the foundation of dredging engineering and watershed management etc.There are several main tasks in this work project, including: (1) Control surveying, (2) Reservoir sedimentation surveying, (3) Laser scanning in the dam area, (4) Digital topographic map and Digital Elevation Model (DEM) of the reservoir, and (5) Reservoir volume calculation. The survey area of tasks is from the equilibrium level 235m extended 100m in horizontal direction, including both sides of Provincial Highway No.3, the dam, spillway and reservoir pool. In conclusion, it takes about two operating times, respectively before the flood period and after the flood period.