scholarly journals Study of Macro- and Mesodamage of Remolded Loess under Alternating Dry and Wet Conditions in an Acid Rain Environment

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Wanjun Ye ◽  
Yuntao Wu ◽  
Yang Bai
Keyword(s):  
Acid Rain ◽  
River Basin ◽  
Yellow River ◽  
Yellow River Basin ◽  
The Yellow River ◽  
Chemical Erosion ◽  
Ecological Protection ◽  
Physical Erosion ◽  
The Yellow River Basin ◽  
Number Of Cycles

As a national development plan, ecological protection of the Yellow River Basin has attracted extensive social attention in recent years. Considering the influence of acid rain on the engineering characteristics of loess in this area, we investigated changes in the physical and mechanical characteristics of remolded loess under the combined action of acid rain and dry-wet cycles by means of triaxial tests, nuclear magnetic resonance spectroscopy, and scanning electron microscopy. The results are as follows: in the acidic environment, the stress-strain relationship of remolded loess undergoes stress hardening after dry-wet cycling. The cohesion and internal friction angle of remolded loess are negatively correlated with the number of cycles. From the multiscale analysis of the dry-wet cycle process under acid rain condition, the T2 spectrum of the test soil has three peaks at the micropore level. With the increasing number of cycles, the spectral area increases gradually, and the sample transitions from small pores to large- and medium-size pores. At the microscopic level, the clay mineral particles among soil particles decrease in size, the contact mode between soil particles develops from stable to unstable, the particles are gradually rounded, and the fractal dimension decreases. Chemical erosion and physical erosion are special features of this experiment. Physical erosion causes particle erosion and pore growth, while chemical erosion includes reactions by feldspar. Together, physical and chemical reactions aggravate the soil deterioration process. These research results have laid a good experimental foundation for the ecological protection of the Yellow River Basin.

scholarly journals Research on the coordination degree of ecological protection and high-quality development of urban agglomerations in the Yellow River Basin

2021 ◽  
Vol 271 ◽  
pp. 02008
Author(s):  
Jinhui Zhao ◽  
Yunlong Bai ◽  
Chao Zhang ◽  
Jiawei He ◽  
Siyuan Li
Keyword(s):  
River Basin ◽  
Yellow River ◽  
Yellow River Basin ◽  
Variation Method ◽  
The Yellow River ◽  
Quality Development ◽  
High Quality ◽  
Urban Agglomerations ◽  
Ecological Protection ◽  
The Yellow River Basin

The Yellow River Basin is ecologically fragile, the relationship between water and sand is unbalanced and water resources are scarce. This paper takes the urban agglomerations in the Yellow River Basin as the research object, based on the guidelines for the coordinated promotion of ecological protection and high-quality development in the basin, and uses the entropy weight method and the coefficient of variation method as the means to establish a quantitative evaluation system for coordinated development. The degree of synergy is between ecological protection and high-quality development of the urban agglomerations from the time dimension and the space dimension, and we give the optimization directions. The results show that the degree of synergy among urban agglomerations in the river basin is steadily increasing, but there are significant spatial differences in the degree of coordination of ecological protection and high-quality development of the urban agglomerations and the development index of its subsystems. The degree of synergy generally presents a cascade distribution pattern that gradually decreases from east to west and from downstream to upstream. The ecological destruction, economic fluctuations and water waste of the river basin urban agglomeration are the main factors hindering the improvement of synergy.

scholarly journals The spatial pattern and influencing factors of tourism development in the Yellow River Basin of China

PLoS ONE ◽  
2020 ◽  
Vol 15 (11) ◽  
pp. e0242029
Author(s):  
Shengrui Zhang ◽  
Guanghai Zhang ◽  
Hongrun Ju
Keyword(s):  
River Basin ◽  
Yellow River ◽  
Tourism Development ◽  
Yellow River Basin ◽  
The Yellow River ◽  
The Sustainable Development ◽  
Ecological Protection ◽  
Spatial Differences ◽  
The Yellow River Basin ◽  
Tourism Economy

With the implementation of the Belt and Road Initiative and the national strategy of “Ecological Protection and High-Quality Development in the Yellow River Basin”, the tourism development of the Yellow River basin of China is facing important opportunity. However, the spatial differences of tourism economy and the unbalanced development of interprovincial resources has become a threat for the sustainable development of the basin. By using the statistical data from 2003 to 2018, this paper aims to identify the numerical feature and spatial patterns of tourism development in the Yellow River Basin from the aspects of tourist volume (domestic tourists and inbound tourists) and tourism income (income from domestic tourism and inbound tourism) at provincial and prefectural scales. Analysis of spatial autocorrelation reveals significant clusters and outliers of tourist volume and tourism income at prefectural scale. Location condition, terrain condition, culture resources, regional policies, the interregional relationship and tourism infrastructure were the main factors influencing the spatial differences of tourism development in the Yellow River Basin. The study could offer useful information for the regional tourism management in the Yellow River Basin.

scholarly journals A Review on the Progress of Ecological Environment Research and Improvement of the Yellow River Basin

2021 ◽  
Vol 233 ◽  
pp. 03049
Author(s):  
Yu Tianchen
Keyword(s):  
Water Resources ◽  
River Basin ◽  
Yellow River ◽  
Research Direction ◽  
Yellow River Basin ◽  
The Yellow River ◽  
Ecological Protection ◽  
The Yellow River Basin ◽  
Further Development ◽  
Ecological Optimization

Ecological protection and high-quality development in the Yellow River Basin is a major national strategy for regional economic growth and embodiment of green and coordinated policies. This paper expounds the research direction, implementation measures and existing achievements in the ecological theme for the Yellow River basin in China. It also introduces the methods to realize ecological optimization from the perspective of water resources, which is of certain significance for the further development of ecological protection and rational utilization of water resources in the basin.

Research about Integration Development of Ecological Economy Culture and Tourism

节能环保 ◽  
2020 ◽  
Vol 5 (1) ◽  
pp. 17-19
Author(s):  
Ping Mao ◽  
Keyword(s):  
Environmental Protection ◽  
River Basin ◽  
Yellow River ◽  
Pollution Prevention ◽  
Yellow River Basin ◽  
Ecological Environment ◽  
The Yellow River ◽  
Municipal Governments ◽  
Ecological Protection ◽  
The Yellow River Basin

At the National Conference on Ecological and Environmental Protection in 2020 and 2021, the importance of the ecological environment to economic and social development was stressed. We should adhere to highlighting the precise, scientific and legal treatment of pollution, deepen the battle of pollution prevention and control, continuously improve environmental quality, and continuously enhance the people’s sense of access, happiness and security of the ecological environment, so as to make a good start for the ecological and environmental protection work of the 14th five year plan he took good steps to draw a new blueprint and inject new impetus. Provincial and municipal governments at all levels in the Yellow River Basin have clearly pointed out on different occasions that the Yellow River is of great significance to all provinces and plays an important role and responsibility in the ecological protection and high-quality development of the Yellow River Basin.

scholarly journals Numerical Simulation of the Effect of Stress on the Seepage of Fractured Rock Mass

Geofluids ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-20
Author(s):  
Liang Shiwei ◽  
Wang Hongmei ◽  
Ge Di ◽  
Zhao Cunqing
Keyword(s):  
Numerical Simulation ◽  
Coal Mining ◽  
River Basin ◽  
Yellow River ◽  
Water Pressure ◽  
Rock Fracture ◽  
Yellow River Basin ◽  
The Yellow River ◽  
Ecological Protection ◽  
The Yellow River Basin

In our country, the Yellow River Basin ecological protection and development are put forward under the background of high quality. Among the 14 large-scale coal bases in our country, 9 coal bases are located in the Yellow River Basin, and the Shenfu-Dongsheng Coalfield, which is currently the largest under development, is located here. The region is in the process of coal mining, and the movement of overlying strata will cause the stress redistribution and coal seam in overlying aquifers also due to the effect of pore water pressure along the seepage of rock fracture and damage of overlying aquifer, so in the same formation, stress and the coupled action of seepage flow will produce mutual influence. This article through the early stage of the theoretical results discussed the application of numerical simulation method for simulating 2301 face, and the effect of stress on seepage is concluded. It is proved that the numerical simulation analysis has an important reference value for the coupling problem of stress and seepage. At the same time, the protective mining of aquifers is the basic condition for the surface ecological protection of the area, and it also provides a theoretical basis for the restoration of the ecological environment in the coal mining areas of the Yellow River Basin.

Sign in / Sign up

Export Citation Format

Share Document