Drought Causes and Solutions of Down-Faulted Basin Groups in Nandong Underground River Basin

2013 ◽  
Vol 864-867 ◽  
pp. 2167-2170
Author(s):  
Mei Xian Mo ◽  
Feng Li ◽  
Yu Wang ◽  
Chun Yan Li
Keyword(s):  
River Basin ◽  
Shallow Groundwater ◽  
Water Shortage ◽  
Underground Water ◽  
Karst Water ◽  
Mountain Area ◽  
Hydrogeological Characteristics ◽  
Underground Dam ◽  
Level Elevation ◽  
Underground River

For many years, drought is severe in the basins and the mountain area of Nandong underground river basin. The author analyzes the reasons of the drought from the hydrogeological characteristics of the basin, climate characteristics, groundwater pollution ,and study indicates that the drought causes is that shallow groundwater and surface water has been seriously polluted, and it is extremely difficult to look for underground karst water. Then the author analyse solutions to solve these problems: building underground dam in Moshigou to develop Nandong underground river; rising underground water level elevation up to 1253m,it can intercept about 306 million m3 underground water. In this way, the author predict that the water shortage problem can be solved fundamentally in these three basins.

Adverse Effects of Soil Grouting on Sandy Soils

2015 ◽  
Vol 802 ◽  
pp. 3-9
Author(s):  
Erdal Akyol ◽  
Suat Tasdelen ◽  
Ali Aydin
Keyword(s):  
Underground Water ◽  
Hydraulic Pressure ◽  
Risk Area ◽  
Existing Building ◽  
Existing Structures ◽  
Injection Practice ◽  
Building Foundation ◽  
Hydrogeological Characteristics ◽  
Underground Dam ◽  
One Year

Uncontrolled growing of construction industry in Turkey has caused a large number of buildings were constructed without the benefit of sufficient engineering supervision. These phenomena have contributed to the increase in the number of seismically weak buildings. After the Great Marmara Earthquake seismic performances of the existing structures have been inspected and some of them fortified. In this context, an existing building foundation, built on a problematic soil and located in Denizli where is in high seismic risk area, has been strengthened by cement injection. Grouting holes up to 7 m in depth from the basement level were used in 45 points. The injection has created a less permeable barrier, acts like an underground dam. This barrier has caused rising of the underground water table around the recharge area of the foundation. The raised underground water has increased hydraulic gradient and hydraulic pressure. Then, the basement floor has arched up to 12 cm and underground water has risen up to 30 cm high after one year of the injection practice. In this study, hydrogeological characteristics of the soil structural analysis have been evaluated and some solutions suggested remedying the problem. It should be kept in mind as injection practice is employed in aquifers.

scholarly journals Simulating the Shallow Groundwater Level Response to Artificial Recharge and Storage in the Plain Area of the Daqing River Basin, China

2021 ◽  
Vol 13 (10) ◽  
pp. 5626
Author(s):  
Guangyao Chi ◽  
Xiaosi Su ◽  
Hang Lyu ◽  
Guigui Xu ◽  
Yiwu Zhang ◽  
...  
Keyword(s):  
River Basin ◽  
Artificial Recharge ◽  
Shallow Groundwater ◽  
Water Shortage ◽  
Water Diversion ◽  
Positive Equilibrium ◽  
Plain Area ◽  
Irrigation Supply ◽  
North Water ◽  
Surrounding Areas

Water shortage and overexploitation of groundwater (GW) have become the key factors restricting the development of the Xiongan New Area (XNA), the environmental management of Baiyangdian Lake, and the social and economic development of surrounding areas. This study used a numerical GW flow model to quantitatively analyze the changes to the shallow GW level and GW reserves of the plain area of the Daqing River Basin over the next 15 years (2021–2035) under different artificial recharge schemes with the south to north water diversion project (SNWDP) acting as the GW recharge source. The results showed increasing GW storage and GW levels and that the regional GW resources are in a positive equilibrium state. The rates of change of the well irrigation supply scheme and the joint river-well irrigation supply scheme in the XNA will increase by 14.56% and 11.04% by 2035 as compared with the current situation. The well irrigation recharge scheme for the XNA was determined to be the most effective when comparing with the effects of the different artificial recharge schemes on the GW levels and recharge. This study provides a reference for the management and protection of aquifers in other areas suffering serious GW overexploitation.

Study of temperature and precipitation change in upstream mountain area of the Hexi inland river basin since 1960s

2012 ◽  
Vol 4 (6) ◽  
pp. 522 ◽  
Author(s):  
Lan Yong-Chao ◽  
Xiao Hong-Lang ◽  
Hu Xing-Lin ◽  
Ding Hong-Wei ◽  
Zou Song-Bing ◽  
...  
Keyword(s):  
River Basin ◽  
Precipitation Change ◽  
Mountain Area ◽  
Inland River ◽  
Temperature And Precipitation ◽  
Inland River Basin

Variations in the dissolved carbon concentrations of the shallow groundwater in a desert inland river basin

2021 ◽  
pp. 126774
Author(s):  
Jia Xu ◽  
Hongbo Ling ◽  
Guangpeng Zhang ◽  
Junjie Yan ◽  
Mingjiang Deng ◽  
...  
Keyword(s):  
River Basin ◽  
Shallow Groundwater ◽  
Dissolved Carbon ◽  
Inland River ◽  
Inland River Basin ◽  
Carbon Concentrations

Assessing water resources carrying capacity based on integrated system dynamics modeling in a semiarid river basin of northern China

2014 ◽  
Vol 14 (6) ◽  
pp. 1057-1066 ◽  
Author(s):  
Ying Xie ◽  
Xuyong Li ◽  
Chunsheng Yang ◽  
Yang Yu
Keyword(s):  
Economic Growth ◽  
System Dynamics ◽  
River Basin ◽  
Carrying Capacity ◽  
Northern China ◽  
Water Shortage ◽  
Integrated System ◽  
Dynamics Modeling ◽  
Water Resources Carrying Capacity ◽  
Optimized Allocation

Water shortage is a major problem in northern China, because of a huge population and rapid economic growth. Taking the Luanhe River Basin (LRB) as a study area, we set up a System Dynamics (SD) model of the basin for the period 2005–2010, and considered various important socioeconomic and environmental factors and their correlation. Significant trends for the period 2011–2030 were simulated and the water resource carrying capacity (WRCC) of the LRB and its trends over the next 30 years were analyzed. The results indicate a decreasing trend of WRCC in the basin and that current economic growth is not sustainable. The study investigated possible optimized allocation projects. The most apt project would involve a combination of strategies that could considerably increase the WRCC, reduce demand, and improve water quality.

Drainaging Technology for Construction Subgrade in the Shallow Groundwater Area

2012 ◽  
Vol 193-194 ◽  
pp. 1152-1155
Author(s):  
Yu Qing Yuan ◽  
Xue Chan Li ◽  
Sen Wen ◽  
Wen Bo Huo
Keyword(s):  
Ground Water ◽  
Permeability Coefficient ◽  
Water Pressure ◽  
Shallow Groundwater ◽  
Road Construction ◽  
Underground Water ◽  
Water Area ◽  
The Road ◽  
Construction Methods ◽  
Law Construction

In order to solve subgrade problems during the road construction in the shallow ground water area, light well point drainage technology is used, combined with the zhengbian logistics road. This paper expounds application principle of the light well point drainage, calculation and construction methods. When using light well point drainage, the appropriate permeability coefficient is 4 m/d relatively. If using water rushed law construction, water pressure should be controlled in 0.3-0.7 MPa. After well point equipment operates for 3-5 days, the foundation will form the precipitation funnel; then, soil can be excavated after drainaging 7-8d. It is shown that the light well point drainaging can reduce underground water lefficiently.

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 FORM DIVERSITY OF POPULUS NIGRA L., P. LAURIFOLIA LEDEB. AND P. × JRTYSCHENSIS CHANG Y. YANG IN THE NORTH-WESTERN PART OF THE ALTAI-SAYANIAN MOUNTAIN AREA

2017 ◽  
Vol 2017 (2) ◽  
pp. 19-24
Author(s):  
Андрей Климов ◽  
Andrey Klimov ◽  
Борис Прошкин ◽  
Boris Proshkin
Keyword(s):  
Adaptive Capacity ◽  
River Basin ◽  
Systematic Study ◽  
Sustainable Construction ◽  
Mountainous Area ◽  
Mountain Area ◽  
Breeding Potential ◽  
The North ◽  
Initial Basis ◽  
North Western

The study of the form diversity of Siberian poplar species P. nigra , P. laurifolia and P. × jrtyschensis serves as the initial basis for identifying the adaptive capacity of populations, their economically valuable forms and breeding potential. The carried out analysis of the polymorphism of the species in nature and their cultivated forms showed their considerable diversity in terms of their habitual characteristics. It was revealed that the species of P. nigra , P. laurifolia and P. × jrtyschensis have been studied rather irregularly. The paper features an assessment of the form diversity in the North-Western part of the Altai-Sayan mountainous area. The analysis was performed on the basis of qualitative features of the crown, bark, leaves and shoots. Within the studied territory, P. nigra is characterized by the presence of two morphotypes, according to the nature of the pubescence and two distinct forms of bark color. It has been established that the populations of P. laurifolia of the Tom’ river basin are characterized by a greater polymorphism, both according to the diversity of morphotypes of shoots and pubescence, and by the color and structure of the cortex. The white and green bark forms of the laurel poplar are valuable for sustainable construction and selection work. In P. × jrtyschensis , gray bark forms predominate in populations, and its diversity requires a further systematic study.

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