Experiment Research On Characteristic Of Infiltration And Technical Parameter Of Film-Hole Ditch Irrigation

In the late 1980,s,the film-hole Irrigation was invented after spreading of the cultivation technique with plastic film in XinJiang.This is a new surface Irrigation method for the high efficiency of agricultural water utilization.Water flows on the film that was covered at bottom of border and infiltrates into soil through the holes and the crop growth from the fole.This paper is based on national research on Film—Hole Irrigation theory and technology, combine the characteristics of the Film—Bore Irrigation and"863" items, mainly studied the single point of the Film—Bore Infiltration characteristics and the Film—Bore ditch to Irrigation characteristic of Infiltration and surface flow motion process and Irrigation combine of the main superior factors etc. 1. Through indoor infiltrate experiment, research single point source Infiltration law and analyzes the factors that influence the Film—Bore go into the regulation of Infiltration and the relation between Film—Bore Infiltration and vertical Infiltration, founds the empirical formula to solve the contain water of Infiltration moist body. 2. Make use of the Film Bore flow motion process and the water depth, and combine the shape of the actual ditch, computed the Film Bore ditch parameter of Infiltration, through the contrast analysis proved that method is valid in the Film Hole Irrigation. 3. Combine the water flow characteristic, make use of the actual cross section and measure actually water depth in the period of supply water and the speed of water motion etc. computed the coarse rate coefficient, and computing the result accord to research the result, expressing that method is viable in the film bore ditch Irrigation theories. 4. Analyses research the characteristics of Film—Hole Ditch Irrigation and water flow advance and regression process based on field experiment data. Studied discharge per unit width, film hole and Opening—Hole ratio, slope and Irrigation times of water, which affect water flow advance and regression process. The result advised the water flow advance curve to match the function regulation of exponent. The water regression process curve compare good of relativity with function of exponent and a dollar quadratic function. 5. Studied the influence degree of main factor of water technique to Irrigation evaluation index sign, put forward making use of the cross section to compare the uniformity degree that can analyze the Film—Bore ditch to the water motion process, which evaluate the degree of Irrigation; Combine the on trial data, the basis is according to very bad analysis and square bad analysis of vertical experiment, acquired optimal technique main factor, and evaluated the index of the optimal combine sign; carrying on the analysis of notability to the technique main factor influence for Irrigation evaluation index sign, according to the notability analyses build up experience return function to Irrigation the efficiency of water and Irrigation the uniformity of water. The above research results provided the theories for the expansion application that the Film Bore Ditch of the northwest and dry region Irrigation according to and technique guidance.