Narmada Valley dry deciduous forests
The Narmada Valley dry deciduous forests are a tropical dry forest ecoregion of central India. The ecoregion lies mostly in Madhya Pradesh state, but extends into portions of Chhattisgarh, Maharashtra, and Uttar Pradesh states.
The Narmada Valley dry deciduous forests cover an area of 169,900 km2 (65,600 sq mi) of the lower Narmada River Valley and the surrounding uplands of the Vindhya Range to the north and the western end of the Satpura Range to the south. The Narmada Valley is an east-west flat-bottomed valley, or graben, that separates the two plateaus. The Vindhya Range separates the valley from the Malwa plateau and Bundelkhand upland to the north. The Satpura Range reaches a height of 1,300m and encloses the valley on the south separating it from the Deccan plateau. The ecoregion includes the western portion of the Satpuras, and also extends to the southeast along the eastern flank of the Western Ghats' range. The uplands of this ecoregion are the northern limits of the Indian peninsula.
Rainfall in the ecoregion is highly seasonal; a seven- to eight-month dry season is followed by the June-to-September southwest monsoon, which brings 1,200-1,500 mm of rainfall in an average year. Many trees lose their leaves during the long dry season to conserve moisture.
The ecoregion lies between moister forests to the northeast, southeast, and southwest, which receive greater rainfall from the southeast monsoon, and the drier forests and scrublands of the Deccan to the south and Malwa and Gujarat to the west and northwest. The lowland Upper Gangetic Plains moist deciduous forests lie to the northeast, on the alluvial plain of the Ganges River and its tributaries below the eastern Vindhyas and the Bundelkhand upland. The Chota-Nagpur dry deciduous forests lie on the Chota Nagpur plateau to the east. The Eastern highlands moist deciduous forests, which receive more annual moisture from the Bay of Bengal, lie to the southeast. To the southwest, along the spine of the Western Ghats range, lie the wetter North Western Ghats moist deciduous forests, which receive more moisture from the southwest monsoon winds off the Arabian Sea.
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