A Study on the Comparison of Effect of Precipitation Conservation methods and Surface Runoff on the Vegetation Coverage

alluvion alluvium bilan hydrique du sol cobertura de suelos conservation de l'eau conservation des ressources couverture du sol erosion escorrentia gestion des eaux interfase sedimento agua iran islamic republic irrigation de surface irrigation methods irrigation par ruissellement land cover meteorological factors plant water relations precipitation relaciones planta agua relation plante eau resource conservation riego de superficie ruissellement runoff runoff irrigation sediment sedimento soil soil water balance sol suelo surface irrigation vegetation water conservation water management