Wildfire history and climatic change in the semi-arid loess tableland in the middle reaches of the Yellow River of China during the Holocene: Evidence from charcoal records

The Holocene ◽  
2013 ◽  
Vol 23 (10) ◽  
pp. 1466-1476 ◽  
Author(s):  
Zhihai Tan ◽  
Chun Chang Huang ◽  
Jiangli Pang ◽  
Yali Zhou
Keyword(s):  
Climatic Change ◽  
Yellow River ◽  
The Yellow River ◽  
The Holocene ◽  
Semi Arid

scholarly journals Study on the hydro-chemistry process after mixing between water and rocks

2018 ◽  
Vol 54 (2) ◽  
pp. 104-114
Author(s):  
Xiuyan Jing ◽  
Hongbin Yang ◽  
Na Wang
Keyword(s):  
River Water ◽  
Arid Regions ◽  
Yellow River ◽  
Dilution Effect ◽  
Northwest China ◽  
Experimental Simulation ◽  
The Yellow River ◽  
Mixing Ratio ◽  
Close Attention ◽  
Semi Arid

Abstract The chemical evolution of groundwater has received close attention from hydro-geologists. Northwest China largely consists of arid and semi-arid regions, where surface water and groundwater frequently exchange with each other, and where the mixing and water–rock interactions significantly affect the direction of water quality evolution. Based on experimental simulation, this paper investigates the interactions among the Yellow River water, groundwater and rocks in Yinchuan. The study found that when groundwater is mixed with the Yellow River water, the Yellow River water has a certain dilution effect on the hydro-chemical composition of groundwater; however, this effect is not simply diluted by proportion for no reaction between irons, but a portion of calcium, sulfur, and carbonate form precipitates. After mixing of the Yellow River water, groundwater and rocks, the pH increased, and the carbon dioxide system reached equilibrium again. In addition, CO32− was produced. While Na+ increase was mainly due to dissolution, SO42− decrease was because of precipitation. The precipitation or dissolution of Ca2+, Mg2+, and CO32− mainly depended on the mixing ratio between groundwater and river water, which suggested the reversible behavior of the dissolution-precipitation of carbonate minerals.

Impact of monsoonal climatic change on Holocene overbank flooding along Sushui River, middle reach of the Yellow River, China

2007 ◽  
Vol 26 (17-18) ◽  
pp. 2247-2264 ◽  
Author(s):  
Chun Chang Huang ◽  
Jiangli Pang ◽  
Xiaochun Zha ◽  
Hongxia Su ◽  
Yaofeng Jia ◽  
...  
Keyword(s):  
Climatic Change ◽  
Yellow River ◽  
The Yellow River ◽  
Middle Reach

Effects of check dams on runoff and sediment load in a semi-arid river basin of the Yellow River

2016 ◽  
Vol 31 (7) ◽  
pp. 1791-1803 ◽  
Author(s):  
Erhui Li ◽  
Xingmin Mu ◽  
Guangju Zhao ◽  
Peng Gao ◽  
Wenyi Sun
Keyword(s):  
River Basin ◽  
Sediment Load ◽  
Yellow River ◽  
The Yellow River ◽  
Check Dams ◽  
Semi Arid

scholarly journals Provenance of Aeolian Sediments in the Ordos Deserts and Its Implication for Weathering, Sedimentary Processes

2021 ◽  
Vol 9 ◽  
Author(s):  
Guoxiang Chen ◽  
Zhibao Dong ◽  
Chao Li ◽  
Weikang Shi ◽  
Tianjie Shao ◽  
...  
Keyword(s):  
Yellow River ◽  
Grain Morphology ◽  
Heavy Minerals ◽  
The Yellow River ◽  
Sandy Land ◽  
Mu Us Sandy Land ◽  
Aeolian Sediments ◽  
Southwest Region ◽  
Semi Arid ◽  
Aeolian Sands

Identifying the provenance of aeolian deposits in semi-arid zones of China is beneficial in understanding Earth’s surface processes and helping to alleviate ecological stress. In this paper, we use grain-size, geochemical elements, heavy-minerals, and quartz grain morphology data to investigate the potential source of aeolian sands from the Ordos Deserts (Mu Us Sandy Land and Hobq Desert). Sedimentological, geochemical and geomorphological results indicate that significant provenance differences exist among various parts of the Mu Us Sandy Land, i.e., aeolian sediments from the southwest region are obviously distinct from other areas in the Mu Us Sandy Land but show the same external provenance with the Hobq Desert referring to the sorting, mineralogical maturity, geochemical characteristics, heavy-minerals, and quartz grain morphology. Comparing the samples from the Ordos Deserts with felsic rocks from potential sources via a serious of geochemical methods, we conclude that: 1) Aeolian sands from other regions of the Mu Us are a mixture of binary provenance, i.e., one originated from local lacustrine sediments and underlying sandstones, and another from the Alxa Plateau (AP) carried by northwesterly Asian winter monsoon. 2) The fluvial deposits denuded from the Qilian Orogenic Belt in the Northeastern Tibetan Plateau (NTP) and carried by the Yellow River are likely the initial material source for the southwest region of the Mu Us Sandy Land and the Hobq Desert. 3) The Yellow River plays a significant and critical role in sediment transport for sand seas in arid and semi-arid areas of northern China.

scholarly journals Effects of land use/land cover and climatic change on the ecosystem of North Ningxia, China

2020 ◽  
Vol 13 (20) ◽  
Author(s):  
Hazem T. Abd El-Hamid ◽  
Wei Caiyong ◽  
Mohammed A. Hafiz ◽  
Elhadi K. Mustafa
Keyword(s):  
Land Use ◽  
Land Cover ◽  
Climatic Change ◽  
Industrial Development ◽  
Environmental Changes ◽  
Yellow River ◽  
The Yellow River ◽  
Land Use Land Cover ◽  
Effective Strategies ◽  
Total Percentage

AbstractLand use/land cover change (LUCC) and climate changes are responsible for degradation of any ecosystem in arid and semi-arid regions. Studying the ecological variations is particularly essential for any type of sustainable development, in which LUCC considers as one of the chief inputs. The main objective is to evaluate the impacts of LUCC and climatic changes on the Ecosystem Vulnerability (ESV) using remote sensing and some statistical models around the Yellow River, Ningxia, China. Eleven classes of LUCC were identified during 1995 and 2019: village land, bare land, grassland, industrial land, irrigated land, swamp land, tidal flat, transportation land, urban land, water bodies, and water channels. Grassland may be decreased annually with percentage − 5.873% due to some human activities and environmental changes in climate from one season to another. About 24.23 km2 and 24.86 km2 was converted from grassland to industrial lands and irrigated lands, respectively. ESV has been calculated using LULC, DEM, slope, soil, and geology. About 45% and 60% of 1995 and 2019, respectively, undergone moderate vulnerability. The annual rate of ESVI decreased in low and reasonable but it was increased in moderate, high, and extreme showing – 4.166% as a total percentage of annual vulnerability. High vulnerability area needs proper management. Majority of vegetation area is located in zone under the moderate vulnerability zone; in contrast, grasslands were subjected to high vulnerability. Areas around the Yellow River were subjected to drought and flooding due to climatic change affecting negatively on the production of crops. Also, the desert lands of the study area have been turned to agriculture according to statistical model. Population growth, industrial development, and governmental policies for ecosystem protection were responsible for major changes. This study is more beneficial for decision-making in eco-environmental protecting and planning. Results of this study could help planners in formulating effective strategies for better management of ecosystem.

Ice-wedge casts showing climatic change since the late pleistocene in the source area of the Yellow River, northeast Ribet

2005 ◽  
Vol 2 (3) ◽  
pp. 193-201 ◽  
Author(s):  
Jie Cheng ◽  
Xujiao Zhang ◽  
Mingzhong Tian ◽  
Wenyang Yu ◽  
Jiangkuan Yu ◽  
...  
Keyword(s):  
Climatic Change ◽  
Late Pleistocene ◽  
Yellow River ◽  
Source Area ◽  
The Yellow River ◽  
Ice Wedge
Sign in / Sign up

Export Citation Format

Share Document