Effect Test Of Sky Water Resources Exploitation And Utilization Based On WRF Model

The contradiction between supply and demand of water resources will become more prominent under the influence of climatic change and human activities in the future.In the face of this grim situation,it is imperative to seek a feasible water resources development method.The total amount of sky water resources is very abundant,but the conversion rate of natural precipitation remain low.Therefore,it is of great significance to adopt appropriate technical means to develop and utilize sky water resources,in order to ease the water shortage.In the development and utilization of sky water resources,the effect test is one of the most important links.However,due to the limit of understanding and technology,there is still some blindness and irrationality in the strategy of sky water resources development.At the same time,because of great uncertainty in the test object,the evaluation of the effect becomes a research problem need to be solved urgently.Therefore,understanding the status and distribution of sky water resources,and the efficiency of precipitation in different cloud systems,seeking effective assessment methods and estimating the effects of artificial impacts accurately are very important for developing sky water resources and carrying out scientific precipitation enhancement work.The mesoscale Weather Research and Forecast(WRF)model is used to test the sensitivity of cloud physics parameterization schemes in simulating a precipitation event in Qinghai Province,in order to get the best combination of parameterization schemes.Then,the WRF model was used to simulate the natural precipitation in two sky water resources development cases respectively on May 17,2010 and June 19,2015.Then,using the CMORPH precipitation fusion data and the numerical experiment to analysis the effect and impact.Through the above simulation and analysis,it is found that this two sky water resources development cases have achieved better rainfall enhancement effect.The case on May 17,2010,except the rainfall of Menyuan Station is in a negative effect,the precipitation of the rest stations have increased in varying degrees,of which the Huzhu Station's rainfall appeared the biggest increases,and the average rainfall enhancement is 2.65 mm in this case.In addition to the rainfall reducing effect at Tongren Station and Haiyan Station on June 19,2015,precipitation in other areas increased in varying degrees.Among them,the rainfall enhancement in Huangzhong Station was the lagrest.The average rainfall enhancement of this case is 2.78 mm.The precipitation changes of the two cases in the time series have a good correlation with the starting and ending time of the rain enhancement operation.The result of sky water resources exploitation numerical experiment basically agrees with the conclusion in the previous article.Precipitation around the operation point decreases,and precipitation in Xining and Haidong areas increases.Similarly,changes in the amount of water in clouds have good coherence to precipitation changes.In conclusion,the mesoscale WRF has a good simulation ability in the plateau precipitation and a certain applicability in effect test of sky water resources exploitation.