scholarly journals Factors Influencing the Spatial Distribution of Organochlorine Pesticides in Soils surrounding Chemical Industrial Parks

2009 ◽  
Vol 38 (1) ◽  
pp. 180-187 ◽  
Author(s):  
Guang Wang ◽  
Yonglong Lu ◽  
Tieyu Wang ◽  
Xiang Zhang ◽  
Jingyi Han ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Organochlorine Pesticides ◽  
Factors Influencing ◽  
Industrial Parks

scholarly journals Pollution status of volatile organic sulfur compounds causing odor in Xi River and factors influencing spatial distribution

2020 ◽  
Vol 20 (4) ◽  
pp. 1264-1270
Author(s):  
Xiang Tu ◽  
Shaohua Chen ◽  
Siyu Wang ◽  
Haiqing Liao ◽  
Xuejiao Deng
Keyword(s):  
Spatial Distribution ◽  
Sulfur Compounds ◽  
Organic Sulfur ◽  
Industrial Emissions ◽  
Diethyl Sulfide ◽  
Organic Sulfur Compounds ◽  
Factors Influencing ◽  
Pollution Status ◽  
Volatile Organic ◽  
Volatile Organic Sulfur Compounds

Abstract This study investigated the pollution status of volatile organic sulfur compounds (VOSCs) and the factors influencing their spatial distribution in the Xi River in Shenyang, China. A method for simultaneous determination of 14 VOSCs that cause odor in water samples was developed by using purge and trap coupled with gas chromatography and a flame photometric detector. The results indicated that each target compound could be identified from 15 sampling sites, and the total concentration of 14 VOSCs ranged from 2.575 to 52.981 μg L−1. Dimethyl sulfide (DMS) was the most important contaminant with an average concentration of 4.029 μg L−1, a detection rate of 93.33% and a variation coefficient of 0.72. The VOSCs were primarily distributed in suburban and rural sections, and the suburban section was the worst in regard to pollution by VOSCs. Dimethyl trisulfide was primarily distributed in urban and suburban sections of the Xi River due to industrial emissions. Ethanethiol, DMS, and ethyl methyl sulfide, which are typical by-products of microbial anaerobic decomposition from domestic wastewater, were found in abundance in the suburban section. Diethyl sulfide, diethyl disulfide, methyl propyl disulfide, and 1-propyl disulfide representing agricultural nonpoint source pollution were mostly distributed in the rural section.

Sources and factors influencing the spatial distribution of heavy metals in a coastal lagoon adjacent to the San Quintín volcanic field, Baja California, Mexico

2007 ◽  
Vol 54 (12) ◽  
pp. 1985-1989 ◽  
Author(s):  
Efraín A. Gutiérrez-Galindo ◽  
Albino Muñoz-Barbosa ◽  
L. Walter Daesslé ◽  
J. Vinicio Macías-Zamora ◽  
J. Antonio Segovia-Zavala
Keyword(s):  
Heavy Metals ◽  
Spatial Distribution ◽  
Coastal Lagoon ◽  
Baja California ◽  
Volcanic Field ◽  
Factors Influencing

scholarly journals What Are the Most Important Factors Influencing Springtail Tetrodontophora bielanensis?

Insects ◽  
2021 ◽  
Vol 12 (10) ◽  
pp. 858
Author(s):  
Strahinja Mladenović ◽  
Jan Materna ◽  
Tereza Brestovanská ◽  
Jakub Horák
Keyword(s):  
Spatial Distribution ◽  
Czech Republic ◽  
Negative Influence ◽  
Positive Influence ◽  
Cold Climate ◽  
The Czech Republic ◽  
Soil Layers ◽  
Factors Influencing ◽  
Main Factors ◽  
Landscape Level

The springtail, Tetrodontophora bielanensis, dwells in the litter and upper soil layers. This arthropod mainly inhabits humid litter and soil and prefers a cold climate. We determined the main factors influencing this springtail in forests at the landscape level in Krkonoše and site level in Orlické hory in the Czech Republic. We used passive trunk-tree traps. These traps are highly effective for sampling flightless fauna. We used 128 traps in Krkonoše and 17 traps in Orlické hory. The springtail was significantly positively influenced by the presence of Norway spruce (Picea abies) at the landscape level. Springtails’ abundance was, furthermore, influenced by the spatial distribution of the sampling sites. The negative influence of bark coverage and the presence of fungi, and positive influence of an increasing dimension of trees were significant at the site level. We argue for a more diversified management of mountainous forests with respect to forest history. This appears to be also important for mountainous forests in protected areas.

scholarly journals Development of linear erosion forms under the influence of technogenic conditions

2018 ◽  
Vol 40 (3) ◽  
pp. 1469
Author(s):  
O. A. Mazaeva ◽  
V. A. Khak
Keyword(s):  
Spatial Distribution ◽  
Large Scale ◽  
Water Storage ◽  
Topographic Maps ◽  
Erosion Process ◽  
Shore Zone ◽  
Storage Reservoir ◽  
Erosion Processes ◽  
Factors Influencing ◽  
Erosion Mechanisms

The activation of linear erosion forms in the south of the Irkutsk amphitheatre was stimulated by the construction and exploitation of the Bratsk water-storage reservoir in mid-XX century. In the paper, the characteristics and interaction of natural and technogenic factors influencing the erosion process are described. The construction of reservoir gave rise to new erosion mechanisms such as karst-erosion, aeolianerosion and abrasion-erosion, which did not occur under the natural (undisturbed) conditions. The large-scale topographic maps were used for evaluation of the spatial distribution of erosion in the shore zone; the active erosion processes were observed in 16 areas of the Bratsk reservoir's shore zone; the overall erosionaffected area of the Bratsk reservoir's shore is 332.9 thousand m2.

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