If the dams are removed in a single stroke, the piles of soil and stone would collapse, burying the downstream pools and creating whole new problems. Therefore it is first necessary to do field research and to calculate the amount of sand on the dams before making any decision.
目前攔砂壩周圍缺乏植被，如果貿然拆掉，砂石崩塌，淹沒下游深潭，將造成另一種衝擊，因此必須進行會勘、估算上面的砂石量，再做決定。