Mohsen Armin; Afsaneh Khairi; Vajihe Ghorbannia Kheybari
Volume 27, Issue 3 , October 2020, , Pages 596-616
Abstract
Rainwater harvesting is a management technique with many positive results that can be used to supply the water needed by livestock in rangelands. In this study, suitable sites for the construction of rainwater harvesting systems using multi-criteria analysis (MCE) and hydrological ...
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Rainwater harvesting is a management technique with many positive results that can be used to supply the water needed by livestock in rangelands. In this study, suitable sites for the construction of rainwater harvesting systems using multi-criteria analysis (MCE) and hydrological model (HM) in the GIS environment were identified in the nomadic ecology of Ab Bahareh at the interval of Bahmaei and Lendeh counties in Kohgiluyeh and Boyer-Ahmad province. For this purpose, appropriate criteria maps to identify sites of rainwater harvesting system including slope, rock type, land use and land cover, runoff depth, and drainage density were provided in the GIS environment. After classifying the suitability map of each criterion, the classified map of the criteria was overlaid into the geographic information system environment and the appropriate sites for the rainwater harvesting system were identified. The results showed that in terms of each of the selected parameters, except for the slope, about 30 to 50 percent of the Ab Bahareh area was very suitable for the construction of rainwater harvesting systems. Due to the mountainous nature of the region, the slope parameter is the main limitation for the construction of rainwater harvesting systems. Based on the combined analysis of all the criteria selected, about 25% of the nomadic ecosystem of Ab Bahareh is highly suitable for the construction of rainwater harvesting systems, especially pits and ponds, rock outcropping catchment, road catchment, and check dams that can be provided during the dry season between rains. In regard to the number of 4000 goats and sheep in 5 villages in the nomadic ecosystem of Ab Bahareh, assuming the daily requirement of each livestock to 4 liters of water and the dry period of 30 days between the main rains, the total catchment area for the 25 mm rainwater harvesting system to meet the needs of livestock in the region is about 2.4 hectares.
Leila Mostafavi; Gholamali Heshmati; hamid mostafalou
Volume 23, Issue 4 , March 2017, , Pages 785-799
Abstract
Range suitability assessment for different objectives is along with management principles and guarantees sustainable development. A considerable area of Golestan Province plains is covered with halophytes, grazed by different livestock including sheep. A study was done to assess the suitability of saline ...
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Range suitability assessment for different objectives is along with management principles and guarantees sustainable development. A considerable area of Golestan Province plains is covered with halophytes, grazed by different livestock including sheep. A study was done to assess the suitability of saline winter rangelands with dominant species of Halocnemum strobilaceum and Aleuropus lagopoides for sheep grazing. The F.A.O method in GIS environment was used in this research for Gomishan Plain, Golestan province, Iran. In the method, three criteria of vegetation, water and soil erodibility were used as the sub-models and constituted the final model components. For vegetation sub-model, vegetation types, cover percentage, forage production, range condition and trend and range capacity were determined. Distance from water resources, water quantity and quality were determined for water sub-model. For the soil erodiblity sub-model evaluated by the EPM model, slope, rock and soil sensitivity to erosion were determined. The final model of range suitability for sheep grazing revealed that 38.69 and 61.31 percent of the region were classified as low suitability and no suitability, respectively. Among all factors determined in sub-models, the distance from water resource was the most limiting factor for sheep grazing and forage production was the most reducing factor of range suitability. Finally, utilization of rangelands in the region could be improved by reducing grazing intensity and implementing range restoration practices.