江淮分水嶺地區(qū)蔬菜集雨節(jié)水栽培機(jī)理與效應(yīng)的研究.pdf

1、安徽農(nóng)業(yè)大學(xué)碩士學(xué)位論文江淮分水嶺地區(qū)蔬菜集雨節(jié)水栽培機(jī)理與效應(yīng)的研究姓名：胡家敏申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：氣象學(xué)指導(dǎo)教師：郁家成20050601AbstractDroughtandwatershortageisaworldwideproblem，andthewaterreso甜ceofourcountryisespeciallyshort，onepersonoccupyonly2200m3，whichdoesnotreach114oft

2、heaverageofthewordTheseriouslyshortageofwaterresourceshasbecomeoneofthenlflinfactorsthatlimitourcountryagriculturaldevelopmentcontinuously。Jiang—Huaiwatershedregionbelongstosemi—aridareasandsemiwetnessareas，locatingtheno

3、rthsubtropicsIt’Sseasonaldroughtisveryserious，forexample，evenitisinfloodyear，thereisalsoseasonaldroughtJiangHuaiwatershedregionliesinthesouthoftheHuaiheriverandthenorthoftheYangtzeRiverandwhichcomesintobeingtheshapeofthe

4、“ridgeoffish”ItbelongingstomountainDabie’Stailridge，andithasmostlyslopingfields，thusthewaterflowiseasyformedonthesurfaceofearth，andthesoil’Sabilityofkeeppingwaterisweak，Andmostlypartsofthisregionlocatesbelowirrigationwat

5、erlevel，andtheterrainisbrokenup，thusitnotpropertoestablishtolarge—scalewaterconservancyfacilities，theeconomyandsocialdevelopmentalsoCannotkeepupwithAccordingtoabovereasons，forthesakeofimprovingagricultureproductivityanda

6、gricultureproducelevel，during2004Marchto2005May，thewriterproceededwiththeexperimentofrun—offinthefarmlandofAnhuiAgriculturaluniversityandtheexperimentofvegetablewatersavedcultivated，anddrawsmainconclusionshereinafter：1Wi

7、thHefeiregionasrepresentativeAnalyzetheinfiltrationcharacteristicsofJiangHuaiwatershedregionpointouttherainfallinfiltrationisdividedintothestageofflux—controlandthestageofthesection—control，therateofinfiltrationinthestag

8、eoffluxcontrolisequaltotheintensityofrainfall2Inthetermofartificialsimulationofrainfall，applyingthemodelofSCSprinciplethatisputforwardbythewaterandsoilconservationbureauoftheUnitedStates，gettingathevalueofCNforthesoilofH

9、efeiregionisenlargerMongwiththeaggrandizementoftheslope，thatistosay，therunoffisenlargeralongwiththeaggrandizementoftheslope一3Pointontifweconsidertocollecttherainstormonlyonefarmlandwith氆eareaof667m2cancollectwateroftheru

10、noffby40m3atmostwecandigwaterharvestingditchwiththecapacityof40m3alongwithcontourlineThecrosssectionofwaterharvestingditchistrapezia，with1Sinhigh，12mupwidth，08downwidthRegardingmyschool’Sagriculturaldemonstrationdistrict