渭河中下游干流洪水资源化效益分析与测算

渭河流域中下游不仅水资源总量紧缺,而且配置型、工程型、水质型缺水问题突出,实施洪水资源利用在河道减淤和流域防洪等方面具有显著的经济和环境效益。通过分析河道冲淤特性、确定洪灾损失标准、统计堤防建设和使用现状,结合研究区经济发展现状和土地利用特征,采用效益分摊系数法,计算渭河中下游干流洪水资源化综合效益。主要结论：（1）洪...

Calculation of benefits of floodwater utilization in the middle and lower reaches of Weihe River

The shortage precipitation in the middle and lower reaches of the Weihe River and its nonuniformity in space-time location have caused frequent occurrence of flood and drought in recent years. This resulted in not only the shortage of total amount of water resource, but also some serious problems related with water quality, water distribution and water engineering. Accordingly, floodwater utilization plays an important part in environmental protection and economic development, and it will get benefits in many aspects such as sedimentation reduction, flood control and economic growth. In this paper, integrated benefits of floodwater utilization were calculated by benefit\\sharing coefficient based on analysis of characteristics of channel deformation, flood loss criteria, dam building and land use. The results are obtained as follows. The greater the flood flux, the more the riverbed erosion. The sediment reduction benefit will be 6200×10⁴ yuan per year by decreasing the sediment deposition, the flood control benefits will be 24618×10⁴ yuan per year, including 1926×10⁴ yuan in the middle reaches and 22692×10⁴ yuan in the lower reaches. The economic benefits will be 7743×10⁴ yuan per year, including 1194×10⁴ yuan of breed aquatics and 6549×10⁴ yuan of irrigated farming. All the above indicated that the total benefits of floodwater utilization in the middle and lower reaches of Weihe River can reach 38561×10⁴ yuan per year.