Study On The Real-time Optimal Of Multi-irrigation Water Source

Water resource as the basis of Natural source is fundamental to the survival of all living things on earth,it not only affects the agricultural production,but also has a very important influence to the national economy.Under the condition of the agricultural water use gradually reduce but there is a water resource waste and low efficiency of irrigation water resources utilization,how to improve the utilization efficiency of irrigation water will have a very important influence to the development of water-saving agriculture in China.More than ever during the optimization allocation of water resources for irrigation area using the method of typical year,in a typical year established under the condition of water for irrigation water in time and space distribution,and ignores the differences between the region crop growth condition and the actual hydrological and meteorological conditions,Which leads to the optimization results can not scientific to guide agricultural production.1.Summer maize non full irrigation system model.On the basis of farmland water balance equation,summer maize non fully real-time irrigation system model is established,making a further analysis of the effect of various parameters in the model.2.The parameter correction of Summer maize non full irrigation system model.According to the field experiments from 2013 to 2014 in water-saving irrigation proving ground in North China University of Water Resources and Electric Power,the irrigation wetting depth was corrected by using root zone analysis function of the IrriMax,the crop coefficient was achieved by crop coefficient correction model and the soil moisture was simulated and analysised by the soil moisture forecast model.3.Daily calculation of summer maize water sensitivity index.In moisture Jensen model based on the analysis of the water sensitivity index of a cumulative,a new methodis proposed to calculate the water sensitivity index,and the summer maize water sensitivity index are calculated day by day.4.Study on the real –time optimal of multi irrigation water source.Based on the theory of summer maize non real-time irrigation adequately,has established the large system decomposition-coordination model combined with summer mazie real-time irrigation forecast,with the goal of maximizing the irrigation crops yield and minimum water supply cost,real-time calculation and analysis on the optimal allocation of water resource.The results showed that: When there are multiple irrigation water in irrigation area,fully consider the characteristics of the various water sources,study on the real-time optimal of irrigation water source in different stage of summer maize,It would make the field irrigation more precise in timing and quantity,it also can improve the utilization efficiency of irrigation area water resources,To promote the sustainable development of water resources and economic and social.