IIIFカラー高解像度
国立情報学研究所 - ディジタル・シルクロード・プロジェクト
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| IIIFカラー高解像度 |
| Overland to India : vol.2 | |
| インドへの陸路 : vol.2 |
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引用情報
LI THE SANDY DESERTS OF PERSIA 239
14
Whole hillocks of sand will be transported from one place
t to another when the wind blows hard. We had enjoyed a
lk' taste of these siroccos in Askizar, where the courtyard,
Ilk during the afternoon, was filled with clouds of sand."'
ith,M `Gregor also, describing the advance of the sand
towards Yezd, says that the advance is of course very slow,
but seems to be very constant. Sykes says : " Quitting
hli Yezd, our road ran across a sandy tract, which was, how-
ls! . ever, cultivated in parts, to Hujetabad where a fine caravanserai and reservoir for water had been recently
11j constructed. All around was a sea of sand."
IliIn Southern Afghanistan lies Rigistan south-east of the
Hilmend and its great tributary, the Dori. Rigistan
ht signifies sandy desert. We have here an example of sand
si in Eastern Iran accumulating not only south of depressions
11 but also south of rivers. We find the same disposition in
Turkestan, where the sandy desert Muyun-kum is situated
it to the south of the river Chu, Kizil-kum south-west of the
m
Syr-darya, and Kara-kum south-west of the Amu-darya.
I It is the same in India, where the great Indian desert
blies south-east of the Indus and Sutlej. In this region I
northerly winds prevail, at any rate in winter. Walther considers that these masses of sand come from the sandy silt on the flat left banks of the large rivers.
Q Thence the sand moves in the form of broad deserts south-
` westwards, and advances like an encroaching sea over the
level plains. He gives the rate of advance as 20 feet a
M year. " Another source of desert sand is the bottoms and
Iz shores of lakes with a fluctuating level, and also the bottoms
V of dried-up lakes."
I In Eastern Turkestan, also, we find large masses of sand
F on the south and south-west of rivers and lakes Tarim and
i Lop-nor. Roborovski describes the sandy desert Ak-bel-
!: kum, which extends along the southern shore of Bagrash-kul.
I The sandy desert Kum-tag, which, according to Obrucheff,
has been piled up by the prevailing north-easterly and
I easterly winds, lies to the south-west of Kalachi-nor, where
1 the river Buluntsir falls into it. The same explorer found
the old beds of the Hwang-ho south of Khara-narin-ula 1 Six Months in Persia, vol. ii. P. 4.
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