Exploration and practice of ecological protection and restoration about mountains-rivers-forests-farmlands-lakes-grasslands in the Qilian Mountains

Rongrong, 马蓉蓉 Ma; Yuhan, 黄雨晗 Huang; Wei, 周伟 Zhou; Ji, 周际 Zhou; Zhongke, 白中科 Bai; Yanjun, 官炎俊 Guan; Lianfu, 郑连福 Zheng; Peiyuan, 詹培元 Zhan; Zheng, 杨正 Yang; Yan, 张艳 Zhang

doi:10.5846/stxb201906111231

Cited by 5 publications

(5 citation statements)

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“…Influenced by the Siberian High Pressure, East Asian monsoon, and westerly jet stream, it experiences long, cold, dry winters and short, cool, humid summers [5][6]. The climate is continental, with precipitation mainly from May to September [7].…”

Section: Overview Of the Study Areamentioning

confidence: 99%

Response of Lake Dynamics to Climate Change in the Qilian Mountains from 1990 to 2020

2023

erej

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Lakes are sensitive indicators of climate change. Based on the lake dataset and Landsat remote sensing data, we analyzed the changes in area and number of lakes (>1km 2 ) in the Qilian Mountains from 1990 to 2020, as well as the boundary changes of lakes(>100km 2 ). In addition, we discussed the impact of climate change on lake area. The results showed that: (1) From 1990 to 2020, the total area and total number of lakes in the Qilian Mountains showed an overall increasing trend, with a total area increase of 492.47km 2 and a total number increase of 10. Among them, Qinghai Lake, Hala Lake, Xiao Qaidam Lake, and Nauru Nor Lake showed an overall expansion trend, while Caka Salt Lake and Da Caidam Lake showed an overall shrinking trend. (2)The main reasons for the expansion of Qinghai Lake and Hala Lake was the increase in precipitation, while the main reason for the expansion of Xiao Qaidam Lake and Nauru Nor Lake was the increase in temperature and precipitation. The main reason for the shrinkage of Caka Salt Lake was the enhancement of evapotranspiration. (3) Lakes in the Qilian Mountains were mainly expanding, which has a good promoting effect on improving the ecological environment of this region and even larger area. However, we should also pay attention to problems such as floods and salt-alkali land caused by lake expansion in a timely manner. In addition, governments and all sectors of society should take corresponding measures to alleviate further shrinkage of Caka Salt Lake.

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Section: Overview Of the Study Areamentioning

confidence: 99%

Response of Lake Dynamics to Climate Change in the Qilian Mountains from 1990 to 2020

2023

erej

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“…The region is affected by the interaction of the Siberian High Pressure, the East Asian monsoon and the westerly jet stream, with long, cold, dry winters and short, cool, humid summers (Chen et al 2011). It belongs to a continental high-altitude semi-humid mountainous climate with precipitation mainly concentrated from May to September throughout the year (Ma et al 2019).…”

Section: Overview Of the Study Areamentioning

confidence: 99%

Response of lake dynamics to climate change in the Qilian Mountains from 1990 to 2020

Zhao

Zhang

et al. 2023

Preprint

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Lakes are sensitive indicators of climate change. Based on the lake dataset and Landsat remote sensing data, we analyzed the changes in area and number of lakes(> 1km2) in the Qilian Mountains from 1990 to 2020, as well as the boundary changes of lakes(> 100km2). In addition, we discussed the impact of climate change on lake area. The results showed that: (1) From 1990 to 2020, the total area and total number of lakes in the Qilian Mountains showed an overall increasing trend, with a total area increase of 492.47km2 and a total number increase of 10. Among them, Qinghai Lake, Hala Lake, Xiao Qaidam Lake, and Nauru Nor Lake showed an overall expansion trend, while Caka Salt Lake and Da Caidam Lake showed an overall shrinking trend. (2)The main reasons for the expansion of Qinghai Lake and Hala Lake was the increase in precipitation, while the main reason for the expansion of Xiao Qaidam Lake and Nauru Nor Lake was the increase in temperature and precipitation. The main reason for the shrinkage of Caka Salt Lake was the enhancement of evapotranspiration. (3) Lakes in the Qilian Mountains were mainly expanding, which has a good promoting effect on improving the ecological environment of this region and even larger area. However, we should also pay attention to problems such as floods and salt-alkali land caused by lake expansion in a timely manner. In addition, governments and all sectors of society should take corresponding measures to alleviate further shrinkage of Caka Salt Lake.

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“…critically affected the overall and long-term ecological barrier function and ecological service function of the region [33][34][35]. Meanwhile, the issue of illegal mining has come to light, and ecological and environmental problems in the region have attracted public attention.…”

Section: Description Of the Study Areamentioning

confidence: 99%

“…The Qilian Mountains are an "essential area for water conservation" in China's key ecological functional areas [28][29][30] and play the dual role of "ecological security barrier of the Qinghai-Tibet Plateau" and "sand prevention belt in the north" [31,32]. At present, social and economic activities such as urban construction, factories, mining enterprises, and transportation have become increasingly frequent, aggravating the prominent problem of local ecological environment destruction in the Qilian Mountains, which has critically affected the overall and long-term ecological barrier function and ecological service function of the region [33][34][35]. Meanwhile, the issue of illegal mining has come to light, and ecological and environmental problems in the region have attracted public attention.…”

Section: Introductionmentioning

confidence: 99%

Characteristics and Potential Ecological Risks of Heavy Metal Content in the Soil of a Plateau Alpine Mining Area in the Qilian Mountains

Zhang,

Cao,

Cao

et al. 2023

Land

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In recent years, the ecological and environmental problems caused by mining in the Qilian Mountains have attracted considerable attention, and the government has carried out a number of comprehensive ecological environment remediation projects there, among which ecological restoration in the Qilian Mountain alpine mining area is an essential task. As a result, heavy metals have been studied in the soil of the Qilian Mountain alpine mining area. This can provide a scientific basis and data support for the establishment of a demonstration index for monitoring ecological environmental restoration in mining areas. In order to understand the content and contamination status of heavy metals in the soil surrounding the alpine mining area of Qilian Mountain, 56 soil samples were collected to determine the levels of eight heavy metals, including Cd, Hg, As, Pb, Cr, Cu, Zn, and Ni. The spatial distribution of heavy metals in the soil of the study area was analyzed based on a statistical approach. The single-factor pollution index (Pi), Nemerow comprehensive pollution index (PN), geoaccumulation index (Igeo), and potential ecological risk index (RI) were used to evaluate soil heavy metal pollution and potential ecological risk. Principal component analysis (PCA), positive matrix factorization (PMF) models, and geostatistical analysis were also used to investigate the source of heavy metals. The results show that the average Cd, As, Cr, Cu, Zn, and Ni content of the grassland soil around the mining area exceeds the soil background values in both Qinghai Lake Basin and Qinghai Province. The spatial distribution of the eight heavy metal elements in soil showed an island-like pattern, with high-value areas of each metal element appearing, indicating that human activities in the study area had negative effects on the soil environment. The value of the single pollution index showed that levels of Ni, Cd, Cu, Cr, Hg, and As pollution were low, while there was no Pb or Zn pollution. The Nemerow integrated pollution index had an average value of 1.39, indicating a slight pollution trend. The average values of Cr and Zn in the geoaccumulation index ranged from 0 to 1, indicating mild to moderate contamination in the studied region. The average value of the integrated ecological risk index in the study area was 135.43, which is in the intermediate ecological risk range. In descending order of size, the average ecological risk index of each heavy metal element was Hg > Cd> As > Ni > Cu > Pb > Cr > Zn. From the perspective of the spatial distribution pattern of ecological risk, the two high-value discriminants were in the western part of the study area, close to the mining area. Zn, Cu, Pb, and Cd in soils were mainly affected by human activity, while Cr and Ni were mainly affected by soil geochemistry. Cd is the main contaminant in the study area, and soil Cd contamination of the grassland in the study area must be considered.

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Exploration and practice of ecological protection and restoration about mountains-rivers-forests-farmlands-lakes-grasslands in the Qilian Mountains

Cited by 5 publications

References 0 publications

Response of Lake Dynamics to Climate Change in the Qilian Mountains from 1990 to 2020

Response of Lake Dynamics to Climate Change in the Qilian Mountains from 1990 to 2020

Response of lake dynamics to climate change in the Qilian Mountains from 1990 to 2020

Characteristics and Potential Ecological Risks of Heavy Metal Content in the Soil of a Plateau Alpine Mining Area in the Qilian Mountains

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