Study on Risk-Benefit Quantification of Floodwater Resources Utilization

Abstract

This paper combines the risk factors of floodwater resources utilization to quantify the risk-benefit of floodwater resources after adjusting limit water level. The limit water level is a key level involved the flood risk and benefits of the reservoir. After adjustment of limited water level, each risk rate correspond to each water level is obtained. Proportional distribution of increasing water content after adjusting the flood control level. Risk-benefit is comprehensive considered including industry, agriculture, life and ecology. The four benefits are quantified by C-D production function, the sharing coefficient method, water price based on energy and the energy theory. This paper took Shilianghe reservoir of Lianyungang City as the research case. Risk rates and benefits of each limit water level are calculated. Under the conditions of minimum risk and maximum benefits, the result that the control range of the limit water level is 23.9 m–24.9 m at Shilianghe reservoir can be obtained according to the relationship between the limit water level, risk rate and risk benefit.