Research Of Water Regulation By Sluice Dam And Clean-Waste Water Rotation Irrigation Model Of North Canal River Based On Theory Of Eco-friendly

With the shortage of water resources, heavily polluted, deterioration of ecological environment and the low utilization ratio of recycled water in the North Canal River basin, it’s conducive to protect water environmental quality, to maintain water ecological health of rivers and to efficiently use different kinds of water resources though carrying out the researches of river dam ecological regulation and clean-waste water rotation irrigation model based on the theory of eco-friendly. And in this way, final sustainable use of water resources and sustainable developments of economic and society can be achieved. It is of great practical significance for the economic and social development in the North Canal River basin. The main contents of this paper are as follows:(1) Building ecological regulation model by sluice dam and studying the ecological regulation by sluice dam of North Canal RiverIn this paper, it’s firstly proposed the concept of river ecological regulation, aiming at North Canal River’s current situation of management plans and problems, and conducting theory study on ecological regulation. After elaborating on the significance of the ecological regulation and feasibility of the schedule of North Canal River, it formulates standards of ecological regulation in different periods, including abundant season, medium season and dry period, and puts forward ecological regulation control and discharge schemes. This paper established a water dynamic model and the water quality model of North Canal River, and by the coupling model of water dynamic-quality models, it can form the model of the ecological regulation by sluice dam of North Canal River. Under this model, according to ecological regulation control and discharge schemes, it can simulate conditions of normal operations and ecological operations in present year, abundant year, medium year, dry year and extremely dry year. Based on these results and the analysis of the water dynamics and quality characteristics, it can indicate that the river dam ecological regulation has played a positive role on improving the aquatic environment.(2) Structuring agricultural non-point source pollution model with the use of improved SWAT modelWhen building the SWAT model, it needs to collect a lot of basic data in the study area to establish a variety of space and property databases required. For this study, it first analyzes the general existence of the mismatched in the common SWAT model, that is to say, the simulation results by a short series exist large deviations, and can not be achieved the simulation of irrigation more than one water source during the periods of crop growth. Afterwards, used in C#program, the SWAT model has been improved and established the agricultural non-point source pollution model in the downstream of North Canal River.(3) Researching on eco-friendly irrigation mode in North Canal River downstream and coming up with different eco-friendly water rotation irrigation scenesThrough analyzing current problems in irrigation based on extensive researches on the present irrigation status and irrigation programs in the study area, the paper lays down clean-waste water rotation irrigation scenes of winter wheat and summer maize continuous mode, also, the two crops are the local primary production and the main crop planting patterns. With the utilization of the improved SWAT model to simulate scenes of different irrigation scheduling, studying the characteristics of rainfall, runoff, the loss of agricultural runoff of nitrogen and phosphorus and nitrogen leakage, the paper confirms irrigation mode of eco-friendly clean-waste water rotation irrigation under the status of present water sources in the river downstream.(4) Working out adaptation strategies of agricultural non-point source pollution in accordance with the current situation in the North Canal River basinIn this paper, due to the common situations of excessive fertilizer application and having caused agricultural non-point source pollution in the basin agricultural production, it comes up with control measures of agricultural non-point source pollution from the three angles of source control, process blocking and the end of governance.(5) Comprehensive benefits evaluation of ecological regulation by sluice dam and eco-friendly irrigation mode of North Canal RiverWhen building the comprehensive benefits evaluation system, it’s important to make certain the comprehensive benefit evaluation indexes. In this paper, it uses the analytic hierarchy process to determine the weights, and then combines with the fuzzy mathematical theory and Delphi method to build the fuzzy comprehensive evaluation model. Here, it can evaluate the benefits of the ecological regulation by sluice dam and eco-friendly irrigation mode of North Canal River.