ارزيابي عملكرد آبياري با سيلاب بر ميزان توليد علوفه و پوشش سطح خاك (مطالعه موردي - فتح آباد داراب )

An evaluation of water spreading operation on yield and ground cover at Fath-Abad, Darab (case study)

One of current methods for runoff management is water spreading. This method is used at low gradients across the land with relatively deep soils with moderate texture. Water spreading not only decreases flood damages and losses, but also greatly increases water infiltration and vegetation growth on range areas. For evaluation of the performance of three years of water spreading on yield and ground cover at Fath-Abad in Darab, two plots were selected as control and spreading areas were selected. The yield was measured in these two areas by using the clipping and weighing method. Ground cover was measured using the wheel point method. Comparing the ground cover in the two areas showed a significant difference. These differences are related to the variations of herbs, grasses and crypthogame cover. Litter and rock cover did not show significant differences between the two treatments. Comparing yields in the two treatments illustrated significant differences in herb and grass production, but it did not show in shrubs production. Low production of seedlings in the early years of project caused nonsignificant difference of production and coverage for shrubs.