Understanding Hydrological Variability for Improved Water by Ilyas Masih

By Ilyas Masih

This learn presents a hydrology dependent evaluate of (surface) water assets and its continuum of variability and alter at varied spatio-temporal scales within the semi‑arid Karkheh Basin, Iran, the place water is scarce, festival between clients is excessive and big water assets improvement is lower than approach. The research unearths that the continued allocation making plans isn't sustainable and primarily calls for reformulation, with attention of spatio‑temporal variability and saw developments within the streamflows concerning flood intensification and decline in low flows.

The improvement of leading edge tools for quantification of the hydrological fluxes (i.e., regionalization of version parameters according to similarity of the movement period curve and using areal precipitation enter within the hydrological modeling) helped larger figuring out and modeling the basin hydrology. The research of eventualities for upgrading rain-fed parts to irrigated agriculture, utilizing SWAT, recommends the promoting of in-situ soil and water conservation suggestions. Conversion of rain-fed components to irrigation factors major relief within the downstream flows, and calls for extra concerns comparable to much less improvement within the top catchments, training supplementary irrigation and constructing water garage. the data generated is instructive for hydrological review and its use in water assets making plans and administration within the river basin context.

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Understanding Hydrological Variability for Improved Water Management in the Semi-Arid Karkheh Basin, Iran: UNESCO-IHE PhD Thesis

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Additional info for Understanding Hydrological Variability for Improved Water Management in the Semi-Arid Karkheh Basin, Iran: UNESCO-IHE PhD Thesis

Example text

These techniques could also contribute to addressing the catchment degradation issue, as they are likely to promote land cover growth and reduce soil erosion. However, a proper understanding their impacts is required for the informed agricultural and water policy formulation process. The MOE and other institutions have been engaged in the assessment, development and management of the water resources. For instance, a vast network of hydrological stations was established by MOE in the 1950s for monitoring river discharges, climatic variables, sediment yields and water-quality parameters across the whole river system (Figure 6).

6%. Historically, the Karkheh Basin had been the cradle of ancient civilization of Mesopotamia and a boundary between Arab and Persian cultures. The Karkheh Basin, once called the “breadbasket of Southwest Asia” now faces many challenges such as low water and land productivity, poverty, land degradation, groundwater depletion and growing competition for water among upstream and downstream areas and among different sectors of water use such as irrigation, domestic, hydropower and environment (CPWF 2003).

They have argued that under such conditions, increasing the knowledge of the basin hydrology is essential for constructing a sound and sustainable water management. A sound knowledge of basin hydrology is essential for effective water allocation policies so that negative impacts can be avoided, minimized or mitigated (Green and Hamilton 2000). Hydrological analysis provides the basis for detailed accounting of water use and productivity (Molden and Sakthivadivel 1999). It is a basic requirement for water resources development and management evaluations and decision making related to a) assessing water availability, b) understanding the balance between the actual use resource availability, c) improving water allocation decisions, d) monitoring the performance of water use, and e) formulating environmental flow requirements and working out ecosystem restoration strategies.

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