scholarly journals Zoning of Ecological Restoration in the Qilian Mountain Area, China

2021 ◽  
Vol 18 (23) ◽  
pp. 12417
Author(s):  
Lin Liu ◽  
Wei Song ◽  
Yanjie Zhang ◽  
Ze Han ◽  
Han Li ◽  
...  
Keyword(s):  
Ecological Restoration ◽  
River Basin ◽  
Qilian Mountains ◽  
Qinghai Lake ◽  
Ecological Problem ◽  
Heihe River ◽  
Qilian Mountain ◽  
Mountain Area ◽  
Ecological Problems ◽  
The Qilian Mountains

Ecosystem restoration has been widely concerned with the damage and degradation of ecosystems worldwide. Scientific and reasonable formulations of ecological restoration zoning is the basis for the formulation of an ecological restoration plan. In this study, a restoration zoning index system was proposed to comprehensively consider the ecological problems of ecosystems. The linear weighted function method was used to construct the ecological restoration index (ERI) as an important index of zoning. The research showed that: (1) the ecological restoration zones of the Qilian Mountains can be divided into eight basins, namely the headwaters of the Datong River Basin, the Danghe-Dahaerteng River Basin, the northern confluence area of the Qinghai Lake, the upper Shule River to middle Heihe River, the Oasis Agricultural Area in the northern foothills of the Qilian Mountain, the Huangshui Basin Valley, Aksay (corridor region of the western Hexi Basin), and the northeastern Tsaidam Basin; (2) the restoration index of the eight ecological restoration zones of the Qilian Mountains was between 0.34–0.8, with an average of 0.61 (the smaller the index, the more prominent the comprehensive ecological problem representing the regional mountains, rivers, forests, cultivated lands, lakes, and grasslands, and thus the greater the need to implement comprehensive ecological protection and restoration projects); and (3) the ecological problems of different ecological zones are frequently numerous, and often show the phenomenon of multiple overlapping ecological problems in the same zone.

scholarly journals The Impact of Mountain Range Geographic Orientation on the Altitude Effect of Precipitation δ18O in the Upper Reaches of the Heihe River Basin in the Qilian Mountains

Water ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1797 ◽  
Author(s):  
Jianqiao He ◽  
Wei Zhang ◽  
Yuwei Wu
Keyword(s):  
Water Vapor ◽  
River Basin ◽  
Qilian Mountains ◽  
Heihe River Basin ◽  
Heihe River ◽  
Mountain Range ◽  
The Qilian Mountains ◽  
The Impact ◽  
The Heihe River Basin ◽  
Precipitation Δ18o

The precipitation δ18O-elevation gradients are important for paleoclimate, hydrology, and paleoelevation studies. The field setting for this research was the upper reaches of the Heihe River Basin within the Qilian Mountains in the Northern Tibetan Plateau. Three study sites were established along the Heihe main river. These sites were the Yingluoxia and Qilian hydrological stations and the Yeniugou meteorological station. The Yingluoxia hydrological station was the dividing point between the upper and middle reaches of the Heihe River Basin. The altitudes of these sites range from 1600 m to 3300 m. Summer precipitation is predominant with regard to the annual precipitation amount. By analysis of variance (ANOVA), the precipitation δ18O data collected from the three sites were analyzed, spanning a year of precipitation data from 2007.10 to 2008.9. The results showed that the δ18O-elevation gradient was not significant (α = 0.05) at a seasonal or annual scale in this region and the precipitation-weighted annual mean δ18O was −7.1‰. Mechanisms that have been proposed to explain this result consider the role of two processes, including (1) mixing of moisture sources, a process common in an arid and semiarid region, and (2) the absence of a mechanism for water vapor to climb along slopes in the precipitation system. Atmospheric water vapor mainly travels along the trend of the Qilian Mountains range rather than climbing it because this region is dominated by the westerlies and the trend of the Qilian mountains is geographically aligned to the NWW (north-west-west) direction. We demonstrated that, aside from the water vapor source, the spatial relationship between the water vapor transport pathway and the trend of the mountain range are the main driving factors associated with the stable isotope trends in precipitation. As a result, it is important to re-recognize the timing and location of groundwater recharge in the Heihe River Basin.

Influence of climate change on soil erosion in high mountain area: a case study of upper Heihe river basin

2021 ◽  
Author(s):  
Li Wang ◽  
Fan Zhang ◽  
Guanxing Wang
Keyword(s):  
Climate Change ◽  
Soil Erosion ◽  
River Basin ◽  
Effect Of Temperature ◽  
Heihe River ◽  
High Mountain ◽  
Mountain Area ◽  
Impact Of Climate Change ◽  
High Mountain Area ◽  
The Impact

<p>The impact of climate change on soil erosion is pronounced in high mountain area. In this study, the revised universal soil loss equation (RUSLE) model was improved for better calculation of soil erosion during snowmelt period by integrating a distributed hydrological model in upper Heihe river basin (UHRB). The results showed that the annual average soil erosion rate from 1982 to 2015 in the study area was 8.1 t ha<sup>-1 </sup>yr<sup>-1</sup>, belonging to the light grade. To evaluate the influence of climate change on soil erosion, detrended analysis of precipitation, temperature and NDVI was conducted. It was found that in detrended analysis of precipitation and temperature, the soil erosion of UHRB would decrease 26.5% and 3.0%, respectively. While in detrended analysis of NDVI, soil erosion would increase 9.9%. Compared with precipitation, the effect of temperature on total soil erosion was not significant, but the detrended analysis of temperature showed that the effect of temperature on soil erosion during snowmelt period can reach 70%. These finding were helpful for better understanding of the impact of climate change on soil erosion and provide a scientific basis for soil management in high mountain area under climate change in the future.</p>

scholarly journals Satellite Snow-Cover Monitoring in the Qilian Mountains and an Analysis for Characteristics of Stream Snow-Melt Run-Off in the Hexi Region, Gansu, China

1987 ◽  
Vol 9 ◽  
pp. 225-228
Author(s):  
Zeng Qunzhi ◽  
Zhang Shunying ◽  
Chen Xianzhang ◽  
Wang Jian
Keyword(s):  
Snow Cover ◽  
River Basin ◽  
Prediction Models ◽  
Qilian Mountains ◽  
Heihe River Basin ◽  
Heihe River ◽  
Snow Melt ◽  
Run Off ◽  
Hexi Region ◽  
The Heihe River Basin

The images of NOAA/TIROS-N APT, AVHRR and a few Landsat MSS obtained from 1980 to 1985 are analysed in this paper. It is found that the snow-cover distribution in Qilian Mountains is above 3700 m a.s.l. during winter to spring every year. There are two concentrations of snow cover. One is on Mount Leng Longling in the upper reaches of the Shiyang River and the other is located between Hala Lake and Mount Danghe Nanshan.Based on preliminary investigations, it is known that the surface water resource in the Hexi region is 68 8 × 108 m3, of which about 24.8% is from glaciers and melting, and the snow-melt run-off is 7.63 × 108 m3, equal to 62.6% of the total amount of spring run-off.The average value of Cv for spring run-off in the Shiyang River, Heihe River, and Shule River is 0 32 and the Cv value of snow-melt run-off in spring is 0.41, about three times as much as that of the annual run-off in the Hexi, region. A prediction model of spring snow-melt run-off at the Ying Louxia Hydrometric station in the Heihe River area can be constructed by using hydrometeorological data and snow-cover percentage for the Heihe River basin obtained from NOAA/TIROS-N APT, and AVHRR images. The prediction models (2) and (3) have been tested by the Water Resources Management Office of the Heihe River basin in the Zhangye and Flood Prevention Office of Gansu Province. The prediction accuracy is suitable for demands.

Study on the contribution of cryosphere to runoff in the cold alpine basin: A case study of Hulugou River Basin in the Qilian Mountains

2014 ◽  
Vol 122 ◽  
pp. 345-361 ◽  
Author(s):  
Li Zongxing ◽  
Feng Qi ◽  
Liu Wei ◽  
Wang Tingting ◽  
Cheng Aifang ◽  
...  
Keyword(s):  
River Basin ◽  
Qilian Mountains ◽  
The Qilian Mountains

scholarly journals Satellite Snow-Cover Monitoring in the Qilian Mountains and an Analysis for Characteristics of Stream Snow-Melt Run-Off in the Hexi Region, Gansu, China

1987 ◽  
Vol 9 ◽  
pp. 225-228 ◽  
Author(s):  
Zeng Qunzhi ◽  
Zhang Shunying ◽  
Chen Xianzhang ◽  
Wang Jian
Keyword(s):  
Snow Cover ◽  
River Basin ◽  
Prediction Models ◽  
Qilian Mountains ◽  
Heihe River Basin ◽  
Heihe River ◽  
Snow Melt ◽  
Run Off ◽  
Hexi Region ◽  
The Heihe River Basin

The images of NOAA/TIROS-N APT, AVHRR and a few Landsat MSS obtained from 1980 to 1985 are analysed in this paper. It is found that the snow-cover distribution in Qilian Mountains is above 3700 m a.s.l. during winter to spring every year. There are two concentrations of snow cover. One is on Mount Leng Longling in the upper reaches of the Shiyang River and the other is located between Hala Lake and Mount Danghe Nanshan.Based on preliminary investigations, it is known that the surface water resource in the Hexi region is 68 8 × 108m3, of which about 24.8% is from glaciers and melting, and the snow-melt run-off is 7.63 × 108m3, equal to 62.6% of the total amount of spring run-off.The average value of Cv for spring run-off in the Shiyang River, Heihe River, and Shule River is 0 32 and the Cv value of snow-melt run-off in spring is 0.41, about three times as much as that of the annual run-off in the Hexi, region. A prediction model of spring snow-melt run-off at the Ying Louxia Hydrometric station in the Heihe River area can be constructed by using hydrometeorological data and snow-cover percentage for the Heihe River basin obtained from NOAA/TIROS-N APT, and AVHRR images. The prediction models (2) and (3) have been tested by the Water Resources Management Office of the Heihe River basin in the Zhangye and Flood Prevention Office of Gansu Province. The prediction accuracy is suitable for demands.

scholarly journals Landscape Restoration Design of Guilin Lijiang River Basin Based on” City Betterment and Ecological Restoration”

2020 ◽  
Vol 194 ◽  
pp. 05033
Author(s):  
Weiran Tian ◽  
Ying Huang
Keyword(s):  
Water Quality ◽  
Ecological Restoration ◽  
River Basin ◽  
Optimization Design ◽  
Water Quality Management ◽  
Water System ◽  
River Channels ◽  
Repair Work ◽  
Ecological Problems ◽  
Lijiang River

As an important carrier of urban ecology, urban river channels have serious ecological problems that restrict the development of cities. Taking Lijiang River in Guilin as the research object, the field survey of the water system shape, water quality status, plant landscape and other aspects of the Lijiang River Basin was conducted to analyse its existing ecological problems. Based on the concept of “City Betterment and Ecological Restoration”, the Lijiang River Basin ecological restoration and landscape repair work will be carried out from four aspects: water quality management, construction of natural river shape, coastal vegetation landscape ecological restoration, and water system landscape optimization design, so as to achieve a virtuous cycle of water ecosystem and promote sustainable development of landscape in Lijiang River Basin.

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