圖書典藏及影音數位平台

研發適用於都會區區域排水全河段模擬之高精度三維水理模式，以期能解析高強度降雨下區域排水內之複雜流況，並探討對區排護岸安全之影響。本計畫亦研發體積小不受電磁波干擾之分布式多點自動監測設備，以即時監測區域排水護岸脆弱段之情形。

The main purpose of this project research is to develop a three-dimensional and high-precision hydrodynamic model to simulate the complex flow conditions in urban area drainage systems during high-intensity rainfall. The numerical model is also to combine with the distributed multi-point automatic monitoring equipment and revetment stabilization mode to monitor the vulnerable segments of thedrainage syste,s. In this year’s project, De-shang River in Hukou, HsinChu is chosen as the study site to install automatic monitoring equipment. The pore water pressure inside the revetment and water levels was successfully recorded during Typhoon Kong-rey. In addition, the use of hand-held radar velocimetry can recored the surface water velocity which can be used to estimate thhe discharge later. The measurements of surface flow velocity anf water levels agree well with the numerical simulations. In terms of the vulnerability analyis in De-shang River drainage, two sites damaged in 610 flooding diasater last year were adopted as examples to ckeck the maximum shear stress applied by water flows and the stability of revetments due to the differences between the water levels in channels and groundwater levels inside the revetment. The results show that failure of the revetments of the two sites in 610 flooding disatster may be due to their delapidatedness and poor-mentainess. In this year, the maximum shear stress applied by water flows during Typhoon Kong-rey was far less than the peak shear stress of 610 flood disaster, so there is no damage to the revetments. In revetment stability analysis, the toppling and siliding calculation show the safety and stability of the revetments, but the water flows may still damage the revetments in certain curcumstances.