Abstract
ABSTRACT In wet tropical regions, study of climate warming effects on water resources is important due to the socioeconomic and ecological implications. Observed changes in river flows of a major Indian river basin called the Mahanadi during the period 1926–1980 arepresented in relation to climatic changes that have occurred there. The Mahanadi River Basin is located in the monsoon region of India; its area is 141,600 km2 and its mean annual flow is 66,640 million m3 . An earlier study by the author revealed that the surface air temperature over the basin has increased at a rate of 1.1 C° per century, which is highly significant However there has been no considerable change in the precipitation regime, though a slight decreasing trend is observed. In this article, an analysis of the trends in the runoff of the upper catchment and the whole catchment gauged at Hirakud and Naraj is presented. The results show a steady decrease in the river flows at these locations during the 55 year period of the study; thi...
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