本研究於八掌溪現地實際佈設筐網群量測，並討論筐網群角度變化對地形變動的影響，以了解不同筐網群角度的沖刷及淤積型態，希冀能藉此提供其基本特性以作為護岸保護的參考依據。
實驗過程中共計採用5種筐網群角度(Ө=5.53、20.34、31.4、49.9及80.1度)，藉由實驗區域地形高程量測，分別做以下討論：(1) 淤積丘發展趨勢、(2) 沖刷坑發展趨勢、(3)河床地形變化探討，最後再彙集各角度做綜合性分析，除可了解各種筐網群角度對地形影響，亦可比較不同筐網群角度間之關聯性。
根據實驗結果得知，水流流至筐網群受阻向下刷深，於筐網群佈設方向形成一帶狀深槽區(沖刷坑)，深槽區砂粒子由通過筐網的水流帶至筐網後方形成落淤(淤積丘)，沖刷與淤積的趨勢約與水流流向穩合，顯見淤積沙粒子來源應為沖刷挾帶之泥沙。分析比較實驗所採的5種角度，以Ө=31.4度時整體河床地形變化趨勢最為顯著，短期間內即可顯見變化。

This study is to set up the porous structure group and examine in Bajhang creek, and discuss the angle changes of the porous structure group to the influence that the geography changes, in order to understand scour and deposition types with the different angle of the porous structure group, and hope that can offer the basic property as the frame of reference of revetment protection.
In the process of experiment using five kinds of angles of the porous structure group (Ө=5.53、20.34、31.4、49.9 and 80.1 degrees) , the experiment by the regional terrain elevation measurements is done on the following: (1) the development trend of the deposition mounds, (2) the development trend of scour hole, (3) the river bed geography variety study. Finally, it gathers each angle and makes comprehensive analysis except that can understand the topography influence for each angle of the porous structure group, and it is also related among the different angles of the porous structure group.
According to the experimental results, the rivers is obstructed and brushed downwards deeply to the basket network group according to the experimental result, lay direction form, bring form dark trough district (erode the hole) on basket network group ,Deep sand particle, district of trough, bring, form and leave out silt through basket rivers of network to basket network rear (deposit the mound) ,Make an appointment the rivers and flow into and shut in trend eroded and deposited, it should erode the silt entrained to deposit the sand particle source obviously. Experiment adopts five kinds of angles to analyze and compare. When Ө=31.4 degrees, it is obvious to the overall trend of the river changes in topography in a short time.

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