An Analysis of Precipitation Measurements on Mountain Watersheds

The design of a regional minimum raingauge network

“…When an error of 10% in the regional areal rainfall estimate was considered acceptable, for example, Basalirwa (1991) showed that, for Uganda, the raingauge stations recommended by the method proposed by Ahuja (1959) numbered 374, while 1517 stations were derived by the method of Wilm et al (1939) and as many as 2483 stations were obtained by the method proposed by Ganguli et al (1951) for the same level of error. A general weakness in the methods cited was that the largest numbers of gauges were derived either for dry areas where rainfall-dependent activities were least or were required during the dry seasons, when again rainfall dependent activities would be least.…”

“…These have included Wilm et al, (1939), Ganguli et al (1951), Kohler (1958), Ahuja (1959), Bleasdale (1965), Rodda (1969), Alaka (1970), Gandin (1970), Cislerova and Hutchinson (1974), Kagan (1972), Hutchinson (1974) and Dymond (1982) among many others. Many of these studies have, however, mostly considered raingauge network designs that meet specified error criteria in the regional areal rainfall estimates.…”

Rainfall‐measreument as influenced by storm‐characteristics in southern California mountains

“…5) brings out the fact that 112 storms or 44 per cent of the total number were of such small size-0.50 inch or less-that they produced only 18.45 inches of rainfall or only 5.5 per cent of the total ten-year catch. The small proportion of the total rain represented by these storms coupled with indications of considerable instrumental error in their measurement [19] decided the writer against employing these small storms in the present study. Furthermore, in many cases it was found that slight errors in mea surement of these small quantities caused disproportionate variations in the vectopluviometercomputations.…”

“…The aspect of the watersheds as a whole is southerly. Consequently, extensive north exposures are al most entirely lacking, but minor north exposures are included in the general makeup of the major east and west aspects.The scheme for distribution of the rain-gages has been described [16,19] and an analysis of the first three years' data showed that the method of sampling was statistically adequate [19]. Al though these data indicated that a good distribution of samples had been'obtained, there was no as surance that the vertically placed gages gave true measures of rain-catch by watersheds.…”

“…The scheme for distribution of the rain-gages has been described [16,19] and an analysis of the first three years' data showed that the method of sampling was statistically adequate [19]. Al though these data indicated that a good distribution of samples had been'obtained, there was no as surance that the vertically placed gages gave true measures of rain-catch by watersheds.…”