- 阿昌Lv 78 年前最佳解答
The first construction and river training is the fastest method. This method is the oldest and most commonly used measures. We can widen the river or the river straightened. These can effectively reduce the flood level and increase the river's drainage capacity. However, straightened river project will result in ecological pattern. Because it changes the existing topography, but also changed the river's length and width, making the river habitats of the functions affected.
The second major building in the upstream flood control reservoirs are also an important method. Dam construction has many advantages including power generation, irrigation, farming, flood control, reduce downstream river siltation. In addition to flood control reservoir water outside mediation can also be the amount of water, and use of water power, is common in modern river development approach. But there are many disadvantages include the high cost of a building, damage to downstream natural ecology, but also flooded large areas of land, or even migration.
The third from the start with the fundamentals, good forest soil and water conservation. We can grow a wide range of areas in the hills or the number of trees is strictly prohibited catchment Overused, to reduce the amount of rain caused flooding in the moment. Over the long-term human development, only to current interests, but regardless of the consequences of damage to soil and water, which is one of the reasons causing flooding. Strict government regulations in the law coupled with strong execution. In fact, the longest and most economical method of flood control.
- 咕嚕Lv 78 年前