Volume 13, Issue 26 (12-2022)
jwmr 2022, 13(26): 163-177 |
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Tajiki M, Najafinejad A, Gholipour M, Siroosi H, Sadodin A, Sheikh V B, et al . (2022). Efficiency of Watershed Management Measures on Erosion and Sedimentation of Qarnaveh watershed, Golestan Province. jwmr. 13(26), 163-177. doi:10.52547/jwmr.13.26.163
URL: http://jwmr.sanru.ac.ir/article-1-1192-en.html
URL: http://jwmr.sanru.ac.ir/article-1-1192-en.html
Maryam Tajiki 
, Ali Najafinejad , Mostafa Gholipour , Hamid Siroosi , Amir Sadodin , Vahed Bardi Sheikh , Arash Zare Garizi , Arashk Holisaz
, Ali Najafinejad , Mostafa Gholipour , Hamid Siroosi , Amir Sadodin , Vahed Bardi Sheikh , Arash Zare Garizi , Arashk Holisaz
Gorgan university of agricultural science and Natural Resources
Abstract: (1362 Views)
Extended Abstract
Introduction and Objective: Evaluating the effects of watershed management measures on various components of watersheds is very important for improving the performance of actions. Accurate evaluation requires continuous and correct monitoring. While monitoring is not mostly considered in developing countries due to the high cost of its implementation. Therefore, sufficient data are not available for evaluating watershed management measures. So, the methods should be selected based on available data to achieve appropriate results. Current research is conducted to evaluate the implemented watershed management measures (mechanical, biological) since the early 2001s in Qarnaveh watershed which is one of the subbasins of Gorganrood river great catchment using analysis of available data by different approaches.
Materials and Methods: In order to investigate the effect of climatic and environmental components on erosion and sedimentation, temporal changes of land use and precipitation were assessed in the study period. Due to the importance of investigating local effects of measures, their impact on erosion was investigated using satellite images before and after construction of checkdams. Then, the changing points were identified using recorded suspended load in Tamar station and sequential Mann Kendall approach. Then the amount of erosion and sedimentation for defined study periods was estimated using RUSLE and sediment rating curve approaches.
Results: Satellite image time series mostly showed local erosion control for upstream of checkdams. While, estimated erosion using RUSLE and sedimentation using sediment rating curve for determined study periods using sequential Mann Kendall showed increase in erosion from 36.9 to 38.8 ton per hectare per year from period of 1999-2008 to 2009-2016. Comparison of estimated sediment of Tamar station for two study periods also showed an increase in sedimentation.
Conclusion: Although watershed management operation has had positive local effects on reducing sedimentation, the combined effects of other components such as land use and meteorological conditions resulted a relative increase in erosion and sedimentation of Qarnaveh watershed. Therefore, to evaluate the effects of watershed management measures, the spatial scale of the effects and the interaction between different components should be considered.
Introduction and Objective: Evaluating the effects of watershed management measures on various components of watersheds is very important for improving the performance of actions. Accurate evaluation requires continuous and correct monitoring. While monitoring is not mostly considered in developing countries due to the high cost of its implementation. Therefore, sufficient data are not available for evaluating watershed management measures. So, the methods should be selected based on available data to achieve appropriate results. Current research is conducted to evaluate the implemented watershed management measures (mechanical, biological) since the early 2001s in Qarnaveh watershed which is one of the subbasins of Gorganrood river great catchment using analysis of available data by different approaches.
Materials and Methods: In order to investigate the effect of climatic and environmental components on erosion and sedimentation, temporal changes of land use and precipitation were assessed in the study period. Due to the importance of investigating local effects of measures, their impact on erosion was investigated using satellite images before and after construction of checkdams. Then, the changing points were identified using recorded suspended load in Tamar station and sequential Mann Kendall approach. Then the amount of erosion and sedimentation for defined study periods was estimated using RUSLE and sediment rating curve approaches.
Results: Satellite image time series mostly showed local erosion control for upstream of checkdams. While, estimated erosion using RUSLE and sedimentation using sediment rating curve for determined study periods using sequential Mann Kendall showed increase in erosion from 36.9 to 38.8 ton per hectare per year from period of 1999-2008 to 2009-2016. Comparison of estimated sediment of Tamar station for two study periods also showed an increase in sedimentation.
Conclusion: Although watershed management operation has had positive local effects on reducing sedimentation, the combined effects of other components such as land use and meteorological conditions resulted a relative increase in erosion and sedimentation of Qarnaveh watershed. Therefore, to evaluate the effects of watershed management measures, the spatial scale of the effects and the interaction between different components should be considered.
Keywords: Biological measures, Mann kendall test, Mechanical measures, Sediment rating curve, Universal soil loss model
Type of Study: Applicable |
Subject:
فرسايش خاک و توليد رسوب
Received: 2022/04/1 | Revised: 2023/01/25 | Accepted: 2022/10/19 | Published: 2022/12/1
Received: 2022/04/1 | Revised: 2023/01/25 | Accepted: 2022/10/19 | Published: 2022/12/1
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