The invention discloses a method for protecting a castor
fiber cave. A castor
fiber nest comprises an
underwater outlet an onshore inlet and outlet, and a bionic dam; the bionic dam is built on a river channel close to the castor
fiber nest according to surrounding topographic lines, and a still
water area is formed on the upstream of the bionic dam;
dead wood branches and soil are arranged on thebionic dam, so
river water bypasses the arc-shaped bionic dam, and the castor fiber
nest is prevented from being impacted; and the length of the bionic dam is determined according to the size of thecastor fiber nest, the width of the bionic dam is larger than or equal to 1.5 m, the height of the bionic dam is 0.5-1.0 m lower than the water surface of the
river water, the height of the dead woodbranches is 0.5-1.0 m higher than the water surface of the
river water, and the
dead wood branches are covered with the soil. According to the ,method, the stability of
water level can be guaranteed,a stable aquatic
ecological environment for protecting a castor fiber channel and the castor fiber
cave is created, the still
water area is formed after the bionic dam is built, the castor fiber nestis prevented from being washed away by excessively large and rapid
water flow, and damage to the
ecological environment due to the fact that castor fibers bite trees excessively to build a dam body isavoided.