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Evaluation of Moisture Indicators from an Agricultural Perspective in North Eastern Iran
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Mokhtar Karami *   , Hamzeh Ahmadi |
| Hakim Sabzevari University |
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Abstract: (3082 Views) |
It is important to study moisture in the atmosphere for irrigation management and determining long-term plans for water resource management. In this study, data on climatic parameters of rainfall, minimum, maximum, and average temperature were investigated to determine the moisture index, effective rain, potential evapotranspiration and soil moisture requirements at 12 meteorological stations in northeastern Iran.In the present study, the experimental method of Papadakis was used for estimating potential evapotranspiration and the USDA method was used to determine the effective rainfall in CropWat. 8 environment. Monthly rainfall was determined using the ratio between effective rain, evapotranspiration and rainfall.The results of the processes at the station level were determined based on the IDW interpolation method in ArcGIS 10.2. The results showed that North Khorasan and South Khorasan provinces have high and low humidity conditions, respectively. Most effective rainfall occurs in March and April. Effective rain decreases from north to south. Evapotranspiration potential increases from north to south. The northeastern region has poor moisture conditions. Except for cold regions of North Khorasan, other areas are severely exposed to aridity, and moisture stress is observed for most crops during the hot months of the year. Analyzing the moisture index showed that the moisture index decreased significantly from north to south of the study area. The region has a high potential for evapotranspiration, and in fact, the input of moisture through precipitation is less than the amount lost due to evapotranspiration. South Khorasan faces one of the most critical conditions of potential evapotranspiration. The length of the wet season in the region, except for the North Khorasan province, is short. In areas of South Khorasan, there is almost no wet month. The spatial distribution of moisture indices follows the latitude and regional ripple patterns. The results and findings of this research are important in the planning and management of water resources, agricultural programs and operations.
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| Keywords: Effective rainfall, Potential Evapotranspiration, Northeast of Iran, Moisture requirement |
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Full-Text [PDF 1261 kb]
(13 Downloads)
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Type of Study: Research |
Subject:
Special
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