Field Rainwater Harvesting Of The Semi-arid With Optimized Design Studies

Micro－c刨℃hm e血cultivation Is a kind of catchmeniagrlcultwal techlques．It刎习"s to nonlrrlgatedland and fiat co血oured land which are肘EllV叮rec叨roe of runoff or lack runo丘Building ridge andhryOWCOVering…attlC 6lffi Off fidgC,fCJIZing falnhn COllcentrat1On fTOtu fidgC to furtOWlthpfOVingcYOp water regime and e讪gn cing yield are its basic principles． Optimal design for smp p删帕rn Is the pnmal question which Is met In deVCloping and researching onmicro－catchmen区 cultivation．Howeve风there aremanysu勾ectlve options,lackofreasonable guidingideology andpractlcalw叮咖o呶p血ern's企clslons In researchingandpractlcally即plying吻o血micro－c眈＊目1cul彻ation忆chaques．The research which Is b"ed on叹＂dying the fCsuh ofsoll wat研colltYOI effe戌under micro－catchlneni cultlvatlonAnd analysing b"Ic question abc血optimal design ofstrip p血em explicitly el眈or＆tes the basic idea吮out optimal design ofstrlpp血effi．Followingthebaslc炔a,syntbslzingrelatlve rese盯chresults,ralsingthe bio method ofoptlmal designofstripp叨ernandsetting out questions In optimal design ofstrlp叫em will push foflV毗tothefCsearchandappllcatlonofmlcro－catchment cultivation． The researMs made up oftwo Insepar庇 p侧· First:researching on soilw肮r cOPtrol By means of cons咖cting the system and describing its cons伽Ct of ridge and fum蛐e mechanismof soil wBter comFOI unger mlcfo－c砒hment cultl嗽ion Is TCvealed．with the help of analysing thesystem of ridge and fijrrowconnecting the experimental results of imitating rainfall infiltration andev邓趾成ion,qu团1lfying water contTol effect under micro－catchment cultivation,the four parameterswhich are described the distrib帆ion ofrainfall insoilareputforwardto．(Rfr:theratioofminfallinridgegn dfuflfOWM:non－evendegreeofhonZOntald匕iIbutionofrain创linfurroWXm:theinfilm加onofrainfall In furrow．Xu:oh删眺初ic value of vert1caf distribmion of rainNI in偷ow·)E呷ericalconclusions foml呷omding and soil mol血ne consCTV汕on under micro－catchmem cultivation Inspecially meteorologlcal phenomena and certlon soil are as fOllows． Firstl帅flowing the IncfC田e of mlnfall,the Rfr of spedal strip p血ern Is decreasing,Xm and Xu IsIncreasing,M Is decreaslflg． Second…in certain rainfall,followingthe Increasingofralnfall Intensity,theR丘 ofspecialstnppa仅ern lsdecreasing3xm,xu andm lsdecreashg Third匕in the same rainfall level,In the sfllTlen对o of rldgegnd furro风following the n困rowness ofstrip pattCrn只什,Xm．Jn andM Is decreasing． FOu时h…thC Ch81f8CtCristlC ValuCS(＊——cly R成Xm,Xu＊nd M)Of lflfiltfatlon Of the syst＊m Of ridgeand furrow are closely relative to their function ofsoil molstrue conservation,the Rfr Is the most key Fifth…thoughCV邓gr ation Intensity In furrow Is bigger than oh,evaParatlon Intensity In fi］ed IsS＊JleT山ap Ck． Sboh…in certain ratio ofndge and furrov入the effect ofsoll tnolstrue conservation ofnarrow sniPpattern Is superior to wide stTlp pattCf'－－． Second:rese删h［ng on o…linal design ofstrlp pa杖ern In the basic of rese皿ohing on water control,by means of Introducing the concept of water potenMproductivity under micro－c脓hment cultivation,analys【ng the concept ofcfop molstruesatlsfactoryratloand the ratio of plant area and concentration,concentrating on the叩pile刚on of wa忆…he discussion吻out optimal design of strip pmem under mL才o－catchment cultivation Is c巳rled o帆． In the process of optimal design of stflp p刚em,then殖o of plant area and concentration are己theparameters of geometerlcal relation between the ridge and furrow are dlvldedMo high and lowie＊e＊川脓价孔山e T血10毗咖m欲eadri打on优血觎10n肘ea IS叩h＊lid！n肚吨h lev吐＊a互1＊＊mmds何ue potential produCtivity and the ratio ofplantareaandconcentratlonareaundermlcro－catchme血cultivation are explicitly explained．Second匕geometrical relationship between ridge and凡rrow isdiscussed In the low level In oder to loo...