Comparison of Methods Evaporation Decreasing from Soil Surface in Micro Catchment
2002
Khadjeai, Ebrahim | Roghani, Mohammad | Skoti, | Khani, Javad
No infiltration and natural storage of atmospheric precipitation into the soil profile is one of the main factors makes the moisture equivalence in arid and semi arid regions. This subject reduce water availability to agriculture products in one side and in the other side reduce plant quality and quantity leads to soil erosion in the natural resource. So it is necessary to optimize and uses rain storage systems and producing of evaporation reducing methods. This research was done by the aim of optimizing and Micro catchments and study of the different treatment effects on the increasing moisture lasting into the soil profile during 3 years, 5 treatment and 3 repeat into randomized complete block design. To do this lozenge shape micro catchments constructed 2.5*2.5m in 25% slope. (In order to collection and direct runoff to low slopes and percolating water in to the soil). Percent volume of moisture was measured during the first of spring till growing by T.D.R, the volume of runoff was measured every week and 2 days after rain fall. The data of 3 years were analyzed variance complexity by S.A.S software. Result showed there is 89% correlation between water content, and the significant difference among treatments. The significant difference is also between years and months of research time by study of other variable sources the study of their interactions showed the significant difference. So it is the treatments were the main parameters, they were compared by L.S.D and Duncan methods. Result showed the four treatments could storage the highest amount of moisture that has plastic covering and gravelly cover 5cm thickness and 50cm gravelly filter into the water collection pits. It has also 6.9% moisture higher than observe during the low rainfall year and dry month. The coefficient variations were 19.85%, and this test has been done suitability with regarding the effects of natural conditions and different environmental factors.
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