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防砂坝是河川中最常见的水利设施的一,其主要的功能在于拦蓄河道泥沙、调节泥沙输送、防止侵蚀、控制流心及抑止土石流等。我国兴建了超过数千座的防砂坝,但这些防砂坝的拦砂寿命通常都很短,当大量的砂石被防砂坝拦阻后,防砂坝将渐渐淤满,最后无法继续拦砂,只好在下游继续建新的防砂坝,最后使得山区到处都建满了防砂坝。加上过去的工程建设过于注重安全性与实用性,忽略了对生态环境所造成的冲击,大大破坏了原
Sand control dam is one of the most common water conservancy facilities in the river. Its main function is to intercept river sediment, regulate sediment transport, prevent erosion, control flow center and prevent earth and rock flow. Thousands of sand control dams have been built in our country, but the sand lifespan of these sand control dams is usually very short. When a large amount of sand and gravel is stopped by sand control dams, the sand control dams will gradually become silky and can not be stopped anymore. Continue to build a new downstream of the sand control dam, and finally make the mountain full of anti-sand dam built. Coupled with the construction of the past emphasis on safety and practical construction, ignoring the impact on the ecological environment, greatly damaged the original