The Effect of Conjunctive Use of Fresh and Saline Water in Sistan Region

Sistan region located in Southeast, Iran is one of the many places that are badly in need of special policies for water resource management. Conjunctive use of surface plus groundwater is a common way of an integrated water resources management. The aim followed in this study is to evaluate the strategy of conjunction of saline subsurface water with fresh surface water (Hirmand River) in Sistan region. To achieve this, an experiment was performed within a randomized complete block design of five treatments and three replications on sorghum on the experiment al field of Zabol University located in Sistan dam area within spring of 2013. The fresh and saline water samples required for the experiment were provided from Hirmand river (EC= 1.2 dS/m) and a well existing on the field (EC= 15 dS/m), respectively. Treatments consisted of; control, irrigated with one-half of salty water, alternation in time, mixed vs completely salty water. The studied traits were comprised of the biological attributes of sorghum as well as salinity changes within the soil profile. The analysis of variance showed that there are significant differences (p