圖書典藏及影音數位平台

為確保集集攔河堰之永續經營與長期營運管理及資料數位化等管理需求.以解決營運初期所辦理傳統測量作業對於環境變化資訊無法及時提供之瓶頸，並得以獲得可接受精度之量測數據與航空攝影照片等，以協助提供更快速及時環境與河道變遷之數位資訊與影像，並利用地理資訊系統之建置，將歷年所蒐集之衛星影像及相關測量等資料做有系統整理、建置與比對分析等。

To the sustainable management of the JiJi Weir, Central Region Water Resources Office, Water Resources Agency, Ministry of Economic Affair, has collected the environmental data for long-term change detection of river environment information around the JiJi Weir since it was operated formally in 2002. The environmental data includes topographic survey, cross-section of river, satellite image, etc. The "JiJi Weir aerial surveying and geographic information system development project" started at 2007, aiming to digitalize and manage the previous surveying, satellite images, and relevant information. The aeriel surveying range has expanded since 2009, which included Chingshui River Douliu Weir and south-to-north connecting channel, result in meeting the expectation of management and treatment planning. There were 12 times of aeriel surveying conducted in the period from 2007 to 2012, and the surveying area was expanded to 16,000 hectares in 2013 to 2015. And the surveying area remains the same as 16,000 hectares in 2016. Orthophoto, digital elevation model, topographic map, section map, erosion comparison, H-A-V calculation, water storage capacity calsulation, GIS system data update and Skyline 3D GIS establishment will be accomplished in the project. Moreover, air LiDAR surveying result will be used to produce the DEM in one-meter resolustion in order to aid the management needs and treatment planning. All the result of the project will be listed in the report in detail. The total impoundment of JiJi Weir is approximately 242 hectares. The coverage area full water level in december of 2015 and 2016 is 172.75 and 173.24 hectares. The effective impoundment in 2015 and 2016 is 5.1074 and 5.1457 million cubic meters, which increased 44.3 thousand cubic meters from 2015 to 2016, equivalent to 0.9 percent of effective impoundment.