Rainwater Harvesting For Irrigation Catchments And Water Infiltration Test Research

Aiming at offering scientifically reasonable basis for the development of water-harvesting irrigation agriculture ,studies on water- harvesting and water infiltration were conducted in accordance with the remaining problems in water-harvesting irrigation .In this experiment, by means of artificial simulating rainfall, effects of surface on runoff- harvesting efficacy were studied and two optimum runoff-harvesting surfaces(50ramed 3:7 dust surface and 50ramed losses surface ) were selected. In indoor infiltration experiment ,the variance regular pattern of cumulative infiltration volume and wetting front moving distance under different soil texture ,water-supplying intensity in correspond with infiltration time was studied, the conclusions were as follows: (1 )The variance regular pattern of cumulative infiltration volume accord with Kostiakov model. (2)The relation between wetting front moving distance and time extracted conforms to the function model :Y=Ax2+Bx+C (3)The wetting front moving distance in the vertically downward direction significantly increased in coordination with the increasing of water-supplying intensity. (4)Cumulative-infiltration volume ,wetting front moving distance: sandy loam>loam>clay.