Trend of Change in Discharge of Iranian Major Rivers to the Caspian Sea

Document Type : Research Paper



Changes in river flow in lake and wetland levels, and climate change depends primarily on changes in the volume and timing of precipitation, falls as snow or rain. Changes in evaporation also affect river flows. Several scientific studies have been done and published in scientific journals for the potential effects of climate change on river flows, and many more studies have been presented in internal reports. Studies are heavily focused towards Europe, North America and Australasia, with a small number of studies from Asia (Bates et al2008).Thus, their water flow regimes have more coincidence with rainfall pattern.In addition discharge of these rivers have some irregular fluctuations in past years duration, but it seems they have regular trend. Usually defined "trend" changes slowly, steady and long-term average values. The aims of this research understand the effect of climate change on discharge of major Iranian river of the Caspian Sea basin. Many studies have been done so far in connection with climate change and water resource in different areas of the world. IPCC reports are one of the most important projects related in climate change and water resources.


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