Taking an example of the drainage area of Heihe River as a setting,studying on the fractal characters of mosaic made of glacier,oasis,desert,and so on with quantitative method,the authors conclude that there are some results as followings：（1） Each landscape factor can be ranked according to the complexity（the fractal dimension D） of the mosaic structure：alpine plain> bottomland oasis > flooding Gobi oasis > alpine arctic desert > soil flat salt desert > soil flat desert > middle—height mountain forest > low bottomland oasis > middle—height mountain plain > alpine meadow > grass—growth desert > river—lake salt desert > glacier and firn > flat sandlot desert > fixed dune > low—flat bottomland salt desert > man—made oasis > desert plain > settlement （urban） > desert Gobi > desert erosion Gobi > alpine meadow swamp >semi—fixed dune > moving dune > hill desert > alpine boskage meadow >middle—height mountain boskage plain > middle—height mountain meadow plain. （2） Each landscape factor can be ranked in the terms of the level of stability（SK）：alpine plain > bottomland oasis > middle—height mountain meadow plain > middle—height mountain boskage plain > alpine boskage meadow > hill desert > flooding Gobi oasis > alpine arctic desert > moving dune >semi—fixed dune > soil flat salt desert > soil flat desert > middle—height mountain forest > low bottomland oasis > alpine meadow swamp > middle—height mountain plain > desert erosion Gobi > alpine meadow > desert Gobi > settlement（urban） > desert plain > grass—growth desert > man—made oasis > low flat bottomland salt desert > fixed dune > flat sandlot desert > river—lake bottomland salt desert > glacier and firn.（3） In the middle of the mosaic structure of landscape factors,alpine plain is the most complicated and stablest;the complexity and stability of the natural oasis is greater than that of the man—made oasis.The middle —height mountain meadow plain is the simplest mosaic structure.Glacier and firn,the key of sustaining oasis,are the most unstablest landscape factors.From this we know the truth that we must protect the glaciaLand firn on the alpine in order to sustain the stability of the oasis ecological system.
XU Jianhua
,
AI Nanshan
,
JIN Jiong
,
FAN Shengyue
. A Fractal Study on the Mosaic Structure of the Landscape of Northwest China—Taking the Drainage Area of Heihe River as an Example[J]. Arid Zone Research, 2001
, 18(1)
: 35
-39
.
DOI: 10.13866／j.azr.2001.01.008
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