Drought As A Recurring Extreme Climate Event

1386 Words Feb 15th, 2016 6 Pages
Drought as a recurring extreme climate event can be defined from various perspective, including meteorological, hydrological, agricultural and socio-economic aspects. Materials and Methods Study area
Iran has an area of 1,648,000 km2, is situated in the south-western part of Asia. The climate is influenced by Iran 's location between the subtropical humidity of the eastern Mediterranean area, the subtropical aridity of the Arabian desert areas and its topographical features like presence of the Zagros Chain and the Elburz Chain in the west and the north of this country respectively, two large deserts (the Lut desert and the Kavir desert) in the central Plateau and intensive elevation variability (from −25 m in coastal regions of the Caspian Sea to 5,600 m in central Elburz Chains) (Fig. 1). Because of its geographical location and topographical features, Iran has a variable climate however arid and semi-arid climate cover the majority of this country. This climate characterized by long, hot, dry summers and short, cool winters (Ganji 1968).The average annual precipitation in Iran is approximately 250 mm (Moradi, 2004). The major exceptions are the higher mountain valleys of the Zagros and the Caspian coastal plain, where precipitation averages at least 500 mm annually. In the western part of the Caspian, annual precipitation exceeds 1,000 mm and is distributed relatively evenly throughout the year. This contrasts with some basins of the Central Plateau of Iran that…
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