Abstract
Abstract Spatial variation structure of monthly and annual mean precipitation in the Karnali river basin, Nepal has been analysed by using kriging. The physiographic and climatological features of the basin are presented in sufficient detail to better understand the spatial and temporal variation pattern of the precipitation within the basin. The concept of ‘regionalized variables’ and the theory of kriging have been introduced. Based on the spatial variability of the precipitation obtained by kriging, a methodology has been developed for selecting the best locations for a given number of rain gauges planned to be added in a network. It has been demonstrated that kriging can be of valuable use in identifying the optimal locations for a set of additional rain gauges using kriging standard deviation as an indicator. The results obtained from kriging are realistic to the extent that the stationarity assumptions are true. Quantification of error nevertheless makes it possible to select locations of rain gauge...
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