Land subsidence in the modern Yellow River Delta based on InSAR time series analysis

2014 ◽  
Vol 75 (3) ◽  
pp. 2385-2397 ◽  
Author(s):  
Jin-Zhi Zhang ◽  
Hai-jun Huang ◽  
Hai-bo Bi
Keyword(s):  
Time Series ◽  
Time Series Analysis ◽  
Land Subsidence ◽  
Yellow River ◽  
Yellow River Delta ◽  
River Delta ◽  
Series Analysis ◽  
Modern Yellow River Delta

scholarly journals Soil organic carbon storage changes in coastal wetlands of the modern Yellow River Delta from 2000 to 2009

2012 ◽  
Vol 9 (2) ◽  
pp. 1759-1779 ◽  
Author(s):  
J. Yu ◽  
Y. Wang ◽  
Y. Li ◽  
H. Dong ◽  
D. Zhou ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Yellow River ◽  
Yellow River Delta ◽  
River Delta ◽  
Anthropogenic Activity ◽  
Regional Survey ◽  
Landscape Types ◽  
The Yrd ◽  
Modern Yellow River Delta

Abstract. Soil carbon sequestration plays an essential role in mitigating CO2 increases and the subsequently global greenhouse effect. The storages and dynamics of soil organic carbon (SOC) of 0–30 cm soil depth in different landscape types including beaches, reservoir and pond, reed wetland, forest wetland, bush wetland, farmland, building land, bare land (severe saline land) and salt field in the modern Yellow River Delta (YRD), were studied based on the data of the regional survey and laboratory analysis. The landscape types were classified by the interpretation of remote sensing images of 2000 and 2009, which was calibrated by field survey results. The results revealed an increase of 10.59 km2 in the modem YRD area from 2000 to 2009. The SOC density varied ranging from 0.73 kg m−2 to 21.60 kg m−2 at depth of 30 cm. There were ~3.97 × 106 t and 3.98 × 106 t SOC stored in the YRD in 2000 and 2009, respectively. The SOC storages changed greatly in beaches, bush wetland, farm land and salt field which were affected dominantly by anthropogenic activities. The area of the YRD increased greatly within 10 yr, however, the small increase of SOC storage in the region was observed due to landscape changes, indicating that the modern YRD was a potential carbon sink and anthropogenic activity was a key factor for SOC change.

scholarly journals Land Subsidence and Ground Fissures in Beijing Capital International Airport (BCIA): Evidence from Quasi-PS InSAR Analysis

2019 ◽  
Vol 11 (12) ◽  
pp. 1466 ◽  
Author(s):  
Mingliang Gao ◽  
Huili Gong ◽  
Xiaojuan Li ◽  
Beibei Chen ◽  
Chaofan Zhou ◽  
...  
Keyword(s):  
Time Series ◽  
Time Series Analysis ◽  
Land Subsidence ◽  
Deformation Rate ◽  
Normal Operation ◽  
Integrated Analysis ◽  
Ground Fissure ◽  
Ground Fissures ◽  
International Airport ◽  
Series Analysis

Land subsidence is a global environmental geological hazard caused by natural or human activities. The high spatial resolution and continuous time coverage of interferometric synthetic aperture radar (InSAR) time series analysis techniques provide data and a basis for the development of methods for the investigation and evolution mechanism study of regional land subsidence. Beijing, the capital city of China, has suffered from land subsidence for decades since it was first recorded in the 1950s. It was reported that uneven ground subsidence and fractures have seriously affected the normal operation of the Beijing Capital International Airport (BCIA) in recent years before the overhaul of the middle runway in April 2017. In this study, InSAR time series analysis was successfully used to detect the uneven local subsidence and ground fissure activity that has been gradually increasing in BCIA since 2010. A multi-temporal InSAR (MT-InSAR) technique was performed on 63 TerraSAR-X/TanDem-X (TSX/TDX) images acquired between 2010 and 2017, then deformation rate maps and time series for the airport area were generated. Comparisons of deformation rate and displacement time series from InSAR and ground-leveling were carried out in order to evaluate the accuracy of the InSAR-derived measurements. After an integrated analysis of the distribution characteristics of land subsidence, previous research results, and geological data was carried out, we found and located an active ground fissure. Then main cause of the ground fissures was preliminarily discussed. Finally, it can be conducted that InSAR technology can be used to identify and monitor geological processes, such as land subsidence and ground fissure activities, and can provide a scientific approach to better explore and study the cause and formation mechanism of regional subsidence and ground fissures.

Study on Microbial Community Characteristics in the Northern Wetland Reserve Area of the Modern Yellow River Delta

2013 ◽  
Vol 726-731 ◽  
pp. 463-469
Author(s):  
Guang Ming Zhao ◽  
Si Yuan Ye ◽  
Yuan Zheng Xin ◽  
Xi Gui Ding ◽  
Hong Ming Yuan ◽  
...  
Keyword(s):  
Microbial Community ◽  
Coastal Wetland ◽  
Yellow River ◽  
Salt Content ◽  
Yellow River Delta ◽  
River Delta ◽  
Community Characteristics ◽  
Different Depths ◽  
Negative Linear Relationship ◽  
Modern Yellow River Delta

Yellow River Delta has a special status of coastal wetland research in China. The microbial community characteristics such as community structure, activity and size in the wetland were investigated in the modern Yellow River Delta of Shandong Province. The aim was to find the effect of salinity on the microbial community. There was a significant negative linear relationship between soluble salt content and the total number of microbes, overall microbial activity, and diversity of culturally viable microbes. Differences of the soil bacterial community in different depths were monitored using the terminal restriction fragment length polymorphism (T-RFLP) and clone library analyses. In a word, these results indicate that higher salinity and deeper depth resulted in a smaller, more stressed microbial community which was less active and diverse .

scholarly journals Formation of Plant Communities of the Newly Created Wetland in Modern Yellow River Delta

2010 ◽  
Vol 2 ◽  
pp. 333-339 ◽  
Author(s):  
Jun Xiang ◽  
Qingfang Wang ◽  
Geng Wu ◽  
Yongquan Wu ◽  
Peng Han ◽  
...  
Keyword(s):  
Plant Communities ◽  
Yellow River ◽  
Yellow River Delta ◽  
River Delta ◽  
Created Wetland ◽  
Modern Yellow River Delta
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