Water Function Zoning and Water Environment Capacity Analysis on Surface water in Jiamusi Urban Area

According to the principle of the function division of surface water, the Songhua River basin is divided into 2 primary function regions and 3 secondary function regions by divided system of two grades based on the analysis and evaluation on the water quality and quantity. According to the practical situation that the amount of water reducing and the channel becoming shallow in dry season makes the channel water amount and velocity decrease, the paper employs one-dimensional calculation model and defines model parameters rationally to calculate the water environment capacity of every function zone and get the calculation result. Based on knowing the water environment capacity of the water function region, people should carry out the optimization distribution and management of water resources, ought to improve the benefit and efficiency of water utilization, strictly control developing the industries of highly water-consuming and high-polluting, and construct a water-saving and anti-pollution society extensively.