Barichi, Zohreh (2023) Zoning for recovery land use in order to soil conservation in Sistan region. Masters thesis, university of zabol.
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Zoning for recovery land use in order to soil conservation in Sistan region.pdf Download (119kB) |
Abstract
One of the gaps in the land use classifications in the land use planning schemes is the restoration use. This issue is more obvious in areas like Sistan, which urgently needs restoration to control dust storms and stabilize quicksand. In the present study, the areas with priority for restoration use in order to protect the soil through physical and biological methods were identified and suitable plant functional types for biological stabilization were introduced. The intended scenarios were based on the conditions of dewatering Hamoon wetland, complete dewatering and current conditions. The site selection criteria were determined and mapped, and after weighting and combining the criteria with multi-criteria decision-making methods, the priority areas for soil stabilization and quicksand were identified. For the zoning of wind erosion susceptibility in the study area, the multi-criteria evaluation method (MCE) is used using nine factor criteria including vegetation cover, average wind speed, soil density, sand, clay, coarse soil particles, slope percentage, geology and aspect (wind-rose) and land use (wind deposits) was used as constraint. Factors were standardized using the linear fuzzy method and weighted linear combination (WLC) was used to combine factors, constraints and weights, and the resulting map was reclassified into five classes of erodibility based on the natural breakpoints method. One of the best ways to restore desert areas is biological restoration through the establishment of plant functional types (PFTs) instead of individual species. In the present study, four plant functional types, including Hydrophytes-Halophytes, Xerophytes-Psammophytes, Xerophytes-Alkalophytes and Xerophyte-Halophytes, were identified in the study area, and according to the ecological needs of each type Suitable areas for cultivation of each type were determined by multi-criteria decision making (MCDM). This step was repeated for each scenario separately. At the end, the areas that were identified in the priority of soil protection operations in the first stage and were not recognized as suitable for the cultivation of any plant functional type, were proposed for physical protection. The results showed that the area of the areas requiring physical stabilization in the scenarios of current conditions and waterlogged conditions are 139,994 hectares and 67,356 hectares, respectively, and in terms of percentage, they are 5.01 and 2.41 percent of the entire region, respectively. The area of areas prone to biological stabilization is 99131 hectares and 24412 hectares in the scenarios of current conditions and waterlogged conditions, respectively, and in terms of percentage, it is 3.55% and 0.87% of the whole area, respectively. In other words, the area of areas requiring physical stabilization and the area of areas prone to biological stabilization in the scenario of the current conditions are about 2 and 4 times of the waterlogged conditions, respectively, which shows that in the scenario of the current conditions, the area of the areas requiring physical stabilization and the area of the areas prone to biological stabilization is more than the waterlogged conditions. According to the scale of the present study, the results of this research can answer the management needs of the organizations involved in the field of spatial prioritization and the method of stabilization of quicksand and soil protection in Sistan on a regional scale.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Wind erosion, Multi-criteria evaluation, Fuzzy logic, Restoration land use, Plant functional types, Sistan |
| Subjects: | G Geography. Anthropology. Recreation > GE Environmental Sciences |
| Depositing User: | Mrs najmeh khajeh |
| Date Deposited: | 05 Nov 2024 09:00 |
| Last Modified: | 05 Nov 2024 09:00 |
| URI: | http://eprints.uoz.ac.ir/id/eprint/3693 |
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