Abstract
The lower reaches of the Tarim River (Chala-Taitma Lake) is a typical ecologically fragile and sensitive area in the arid river basin. By 2017, 17 ecological water conveyances have been continuously implemented in this area, and the accumulated ecological water supply has exceeded 6.11 billion m3. It’s necessary to know changement of the Taitema Lake after ecological water transportation. This study investigate the dominant ecological processes on emergy analysis methods and analysis the renewable emergy changement of the Taitema Lake. The results are as follows: (1) Water is the dominant ecological factor in the region, and water resource metabolism is the dominant process in the region's ecosystem evolution. The evolution from desert to lake and wetland ecosystem is the main pattern of ecological water transportation in this area.(2) According to the calculation of the renewable emergy of the Taitema Lake in 2016, the total renewable emergy input is 3.53 x 1020 sej, in which the solar emergy takes up the largest proportion of the total emergy input, which is up to 74.39%.(3) Before 2000, the renewable emergy input in this region tended to decrease. By 2000, there was a significant growing. After 2000, the renewable emergy of the Taitema Lake shows a increasing trend.
Highlights
The Tarim River, the largest inland river in China, originates from the Tianshan mountain and Karakoram mountains and flows into the Taitma Lake in the southeast of the Tarim Basin.The size of Taitma Lake, which is tail region of the Tarim River, is an indicator of the river's water volume
Based on the emergy theory and analysis methord, this study investigated dominant ecological process and ecological factors of Taitema Lake
The conclusions drawn are as follows: (1) Water is the dominant ecological factor in the region, and water resource metabolism is the dominant process in the region's ecosystem evolution
Summary
The Tarim River, the largest inland river in China, originates from the Tianshan mountain and Karakoram mountains and flows into the Taitma Lake in the southeast of the Tarim Basin. The above studies used different methods to analyze and evaluate the ecological effects, including vegetation restoration, nutrient transportion and groundwater response. These achievements are mostly carried out through economic value quantification, which is affected by factors such as market price, human preference and commodity attribute, so it is difficult to accurately assess the real value of natural assets and environmental resources. With the advance of ecological water transportion, the trees, shrubs and grasslands in the Taitema lake area were gradually restored. The last step is to analyze and explain the causes of changes
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