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| 0269 |
Southern Tibet : vol.2 |
Citation Information
OCR Text
For the last three years, from which records are available, we find: 1909 + 4.00,
1910 + 2.15, and 1911 — 12.90.¹ The outflow from the Manasarovar was established
in 1909, and strong in 1910 in spite of the decreasing rainfall in N.W. India from
June to September, which would seem to indicate a delay in the effect of the rain-
fall. But here no doubt several other factors make the problem much more com-
plicated than it seems to be. The annual rainfall in the Panjab for 1909, 1910 and
1911 diminished in a less strong degree, namely, from 24.75 to 21.77 and 19.42.
For the two preceding years, 1907 and 1908, the figures had been 19.21 and 28.95.
Other tables, from other parts of India, show a rise from 1907 to 1908, in some
cases a very considerable one.
There is also another factor of very great importance. Dr. Walker writes in
a letter to me, February 1913: »A certain amount of snowfall occurs in that region
of the Himalayas (N.W.) from our monsoon, but my belief is that most of the snow
falls during the winter and spring months (and even in May and June) from depres-
sions like those which give us our winter rains in northern India.» At another place ²
Dr. Walker says: »The cold weather storms of northern India are of considerable
agricultural importance; their rainfall determines largely the character of the great
wheat crops of northern India, and they provide the chief part of the snowfall whose
melting feeds the irrigation canals during the hotter months of the year.»
The following table on Probable departure from normal of snowfall in the
Western Himalayas, shows, for April and May, a considerable amount of snow be-
fore the last rise of the Manasarovar: ³
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18
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30
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41
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51
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62
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73
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83
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95
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109
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121
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132
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144
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155
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167
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177
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187
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198
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209
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223
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237
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249
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259
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267
268
269
270
271
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279
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289
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305
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323
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334
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345
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356
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367
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381
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393
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403
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415
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428
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445
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461
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473
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487
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503
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517
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532
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