Application of a hierarchical multi-scale framework to delineating spatial units of watersheds (Case study: theTil-abad Watershed, Golestan Province)

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KHOSRAVI GH.R.; SADODDIN A.; OWNEGH M.; BAHREMAND A.R.; MOSTAFAVI H.

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Journal: Journal of Water and Soil Conservation Year:2020 | Volume:26 | Issue:6 Page(s): 1-29

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Title

Application of a hierarchical multi-scale framework to delineating spatial units of watersheds (Case study: theTil-abad Watershed, Golestan Province)

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Keywords

Hydro-morphologyQ1

Landscape unitQ1

Reach unitQ1

REFORM ProjectQ1

River managementQ1

Abstract

Background and Objectives: To describe and evaluate all the complexities and to develop river ecosystem management plans, it is necessary to examine all the components at different spatial and temporal scales. In this regard, a hierarchical multiscale framework has been applied as a flexible, openended approach to conduct hydro-morphological assessment and also to support river basin managers through exploring the causes of hydro-morphological management problems and devising sustainable solutions. The framework has been suggested by REFORM Project (REstoringrivers FOR effective catchment Management). Generally, the hydro-morphological assessment framework and management plan cycle in river basins consists of four main steps as: 1) Delineation and characterization of spatial units; (2) Hydro-morphological assessment of past, current and future trends; 3) Identification and prioritization of pressures and 4) Developing management plan and implementing measures for restoration and rehabilitation The present paper introduces and applies the first stage of this framework in Tilabad watershed (Golestan province-North of Iran). The separating of the different spatial units of the study area allows the first to identify homogeneous spatial units from the region to the geomorphic units and then identify the spatial relationship and hydromorphological processes between them. It is also possible to detect the hydromorphological effects of any natural and human pressure on different scales. Materials and Methods: Remote sensing and GIS techniques along with several additional field surveys as well as some data and information on hydrology, climate, topography, geology and land cover, valley characteristics and channel and floodplain morphology were utilized to divide the river system into internally consistent spatial units including bio-geographical regions, catchments, landscapes, river segments, river reaches and geomorphic units. Results: Based on the above-mentioned methodological framework, the hierarchy of spatial units in the study area contains two units of bio-geographical region, one unit of catchment, four units of landscape, eight segments units and 26 Reach units. Conclusion: The results of this research has important contributions to systemic hydro-morphological assessment and development of management plans in the Til-abad Watershed by increasing process understanding and by providing descriptions on the characteristics and the relationship between different spatial units. This hierarchical multi-scale framework has the applicability and generalizability to other river basins in Iran formulating the integrated assessment and management practices.

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APA: Copy

KHOSRAVI, GH.R., SADODDIN, A., OWNEGH, M., BAHREMAND, A.R., & MOSTAFAVI, H.. (2020). Application of a hierarchical multi-scale framework to delineating spatial units of watersheds (Case study: theTil-abad Watershed, Golestan Province). JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), 26(6 ), 1-29. SID. https://sid.ir/paper/390750/en

Vancouver: Copy

KHOSRAVI GH.R., SADODDIN A., OWNEGH M., BAHREMAND A.R., MOSTAFAVI H.. Application of a hierarchical multi-scale framework to delineating spatial units of watersheds (Case study: theTil-abad Watershed, Golestan Province). JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES)[Internet]. 2020;26(6 ):1-29. Available from: https://sid.ir/paper/390750/en

IEEE: Copy

GH.R. KHOSRAVI, A. SADODDIN, M. OWNEGH, A.R. BAHREMAND, and H. MOSTAFAVI, “Application of a hierarchical multi-scale framework to delineating spatial units of watersheds (Case study: theTil-abad Watershed, Golestan Province),” JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), vol. 26, no. 6 , pp. 1–29, 2020, [Online]. Available: https://sid.ir/paper/390750/en

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