जब भौमजल स्तर (water table) जमीनी स्तर के पास या जमीनी स्तर पर होता है, तो उस क्षेत्र को किस रूप में जाना जाता है?

Groynes are constructed for river bank protection. When a groyne is inclined downstream in the direction of flow, it is designated as a:

What is the available moisture depth for evapotranspiration in a root zone of 1 m depth soil, if the dry unit weight of soil is 1.5 g/cc, field capacity is 30%, and permanent wilting point is 10%?