arid and desert lands in terms of specific environmental characteristics such as low annual precipitation,sequential droughts, huge drop in ground water levels or the like, have always faced strict limitations in waterresources. in the shadow of these characteristics and many other factors, water price index (wpi) is significantlyaffected. this study set out with the aim of identifying and dete...

Up owing salty groundwater, evaporating completely at the ground surface, leads to the buildup of a saline boundary layer, usually with solid salt on the surface. The di usion layer below the surface, if stable, may grow to a nite thickness at equilibrium between the up owing salt and downward di usion. Because of the di erent densities of the uids (low fresh water density in the deeper undergr...

This study was designed to monitor molinate losses in surface and underground waters during Ordram application in a rice field situated in central Portugal. Water samples were collected from different sites, before, during and about one month and a half after Ordram application. Molinate quantification was based on a solid-phase microextraction (SPME) method followed by gas chromatography with ...

Lack of sewage collection systems, percolation of surface waters, and seepage of wells have raised the groundwater table in Shiraz area in the south of Iran. The growing population generates environmental pollution resulting in the degradation of the quality of surface and groundwaters used for agriculture. Inorganic and organic pollutants have been traced in Shiraz water resources. Heavy metal...

Abstract In most cases, taking into account the local geology and hydrology, water entering system of humidified mobile irrigation from underground sources, such as depth artesian wells, has an initial temperature below 12 degrees. Low adversely affects growth absorption activity plant roots, life microorganisms, impairing supply plants with nutrients, mainly nitrogen. As a result, use aquifers...

The goal of this research is to geographical analysis for revelation water necessary in Sulaimaniyah governorate different economic and human sectors all province districts, the role effect proposed dams on supply Sulaymaniyah. In we used inductive method with comparative methods. has got some results, like these: can (%72.64) sulaymaniyah province, so that will significant sulaymaniya resident...

many real water resources optimization problems involve conflicting objectives. in this study, multiobjective genetic algorithm nsga-ii, has been developed for optimization the conjunctive use of surface water and groundwater resources and optimal management of supply and demand of agricultural water. here, optimal allocation of land and water resources to the dominant products in najaf abad pl...