Ideas and patterns of rehabilitation of urban watercourses and rivers (Case study: Shahrood River)

This study was performed in order to assess land suitability of saline and gypsiferous soils of Barm-e- Alvan region, Kohgilouye-va-Boyerahmad Province for sustainable use of these lands. The main objective of land suitability assessment is evaluating the land characteristics in the current economic conditions for optimum use of available resource in order to have a moderate income with minimum soil loss. Salt and gypsum occurrence in soils are key factors of lowland soils cause limitations for crop cultivation. After preparing soil map of the region as basic map, the operation of land suitability classification for the region main crops (rain-fed wheat and barley) was carried out by simple limitation method based on FAO guideline and tables of climatic and soil needs of the crops. The results indicated that soils were classified in three soil orders of Entisols, Inceptisols and Aridisols and topography was the main soil forming factor. It was also distinguished that no major limitation was for the production of these crops. Selection of appropriate crop varieties with more resistance to limiting factors with shorter growth period cause more production, hence improving water and soil resources of the region.