ANALYSIS OF PATNA COLLAPSIBLE SOIL FOR HYDRAULIC CONSTRUCTION PURPOSES

Abstract

Thei firsti andi foremosti requirementi fori ai successfuli irrigatedi agriculturei isi thei developmenti andi maintenancei ofi soili rooti regioni ini whichi thei wateri –i airi –salti ratioi isi favorablei fori planti growth.i Wheni ai wateri tablei risesi ori wateri getsi deterioratedi ori stagnatedi ini thei fieldsi andi remainsi ini thei rooti zonei fori longeri period,i thei yieldi ofi thei cropi getsi seriouslyi affectedi duei toi thei airi deficiencyi ini thei rooti zone.i Thisi airi deficiencyi requiresi drainagei facilitiesi ini thei croppedi area.i Ai simplei buti comprehensiblei definitioni ofi drainagei isi thei removali ofi excessi wateri fromi rooti zonei whichi permitsi somei airi fori normali planti growth.i Ifi thei primei objectivei isi toi loweri thei groundi wateri tablei belowi ai certaini leveli belowi rooti zonei ofi thei crops,i theni subsurfacei drainagei systemi isi necessary.i Therei arei differenti factorsi oni whichi thei selectioni ofi optimumi drainagei plani andi thei designi andi constructioni ofi adequatei andi successfuli drainagei depends,i thosei arei reliabilityi andi adequacyi ofi thei basici drainagei data.i Thei basici datai musti providei thei knowledgei ofi soili texture,i porosity,i saturatedi hydraulici conductivityi ofi thei soili andi thei topographyi ofi thei areai underi consideration