scholarly journals Landscape Pattern Change of Impervious Surfaces and Its Driving Forces in Shanghai during 1965–2010

Water ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 1956
Author(s):  
Yang Yao ◽  
Sen Zhang ◽  
Yuqing Shi ◽  
Mengqi Xu ◽  
Jiaquan Zhang ◽  
...  
Keyword(s):  
Water Quality ◽  
Landscape Pattern ◽  
Driving Forces ◽  
Surface Water Quality ◽  
Water Area ◽  
Impervious Surfaces ◽  
Rapid Urbanization ◽  
The Past ◽  
Pattern Change ◽  
Quality Variation

Rapid urbanization influences the landscape pattern of impervious surfaces, and potentially affects surface water quality. Using ArcGIS and Fragstats, this study analyzed the temporal change of the landscape pattern of impervious surfaces in Shanghai over the past 45 years, and its driving forces and impact on water quality were also analyzed. The results show that both low and high impervious surfaces showed different degrees of expansion, and as a result, the pervious surfaces and water area reduced by 40.1% and 13.8%, respectively. It proves that the fragmentation and diversity of impervious surfaces in Shanghai notably increased in the past decades, and especially the low and high impervious surfaces show substantial changes. The primary driving forces of the landscape pattern change are population density, unit area Gross Domestic Product (GDP), and the percentage of primary industry. The result of Redundancy analysis (RDA) is that the explanatory ability of landscape pattern to water quality variations decreased from 68.7% to 46.4% in the period 2000–2010. It should be stressed that the contribution of the configuration of impervious surfaces to water quality variation is less than that of the percentage of impervious surfaces.

scholarly journals How Effective Are Existing Phosphorus Management Strategies in Mitigating Surface Water Quality Problems in the U.S.?

2021 ◽  
Vol 13 (12) ◽  
pp. 6565
Author(s):  
Shama E. Haque
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Management Strategies ◽  
Surface Water Quality ◽  
Land Application ◽  
Water Soluble ◽  
Phosphorus Recovery ◽  
Water Bodies ◽  
The Past ◽  
The U.S

Phosphorus is an essential component of modern agriculture. Long-term land application of phosphorous-enriched fertilizers and animal manure leads to phosphorus accumulation in soil that may become susceptible to mobilization via erosion, surface runoff and subsurface leaching. Globally, highly water-soluble phosphorus fertilizers used in agriculture have contributed to eutrophication and hypoxia in surface waters. This paper provides an overview of the literature relevant to the advances in phosphorous management strategies and surface water quality problems in the U.S. Over the past several decades, significant advances have been made to control phosphorus discharge into surface water bodies of the U.S. However, the current use of phosphorus remains inefficient at various stages of its life cycle, and phosphorus continues to remain a widespread problem in many water bodies, including the Gulf of Mexico and Lake Erie. In particular, the Midwestern Corn Belt region of the U.S. is a hotspot of phosphorous fertilization that has resulted in a net positive soil phosphorous balance. The runoff of phosphorous has resulted in dense blooms of toxic, odor-causing phytoplankton that deteriorate water quality. In the past, considerable attention was focused on improving the water quality of freshwater bodies and estuaries by reducing inputs of phosphorus alone. However, new research suggests that strategies controlling the two main nutrients, phosphorus and nitrogen, are more effective in the management of eutrophication. There is no specific solution to solving phosphorus pollution of water resources; however, sustainable management of phosphorus requires an integrated approach combining at least a reduction in consumption levels, source management, more specific regime-based nutrient criteria, routine soil fertility evaluation and recommendations, transport management, as well as the development of extensive phosphorus recovery and recycling programs.

scholarly journals The Impact of Urbanization on Water Quality: Case Study on the Alto Atoyac Basin in Puebla, Mexico

2022 ◽  
Vol 14 (2) ◽  
pp. 667
Author(s):  
Andrés Estrada-Rivera ◽  
Alfonso Díaz Fonseca ◽  
Samuel Treviño Mora ◽  
Wendy Argelia García Suastegui ◽  
Edith Chávez Bravo ◽  
...  
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Population Growth ◽  
Industrial Development ◽  
Correlation Coefficients ◽  
Pollution Index ◽  
Surface Water Quality ◽  
Environmental Implications ◽  
Rapid Urbanization ◽  
The Impact

Population growth, poorly planned industrial development and uncontrolled production processes have left a significant footprint of environmental deterioration in the Alto Atoyac watershed. In this study, we propose using the integrated pollution index (PI) to characterize the temporary variations in surface water quality during the rapid urbanization process in the municipalities of San Martín Texmelucán (SMT) and Tepetitla de Lardizabal (TL), in the states of Puebla and Tlaxcala, between 1985 and 2020. We assessed the correlation between the population growth rate and the water quality parameters according to the Water Quality Index (ICA). The contribution of each polluting substance to the PI was determined. The industry database was created and the increase in population and industry, and their densities, were estimated. The results indicated that the temporal pattern of surface water quality is determined by the level of urbanization. The water integrated pollution index (WPI) increased with the passage of time in all the localities: SLG 0.0 to 25.0; SMTL 25.0 to 29.0; SRT 4.0 to 29.0; VA 6.0 to 30.0; T 3.5 to 24.0 and SMA 4.0 to 27.0 from 2010 to 2020, respectively. The correlation coefficients between the five parameters (BOD5, COD, CF, TU and TSS) in the six localities were positive with the population. The values that showed a higher correlation with the population were: SLG (FC 0.86), SMTL (BOD5 0.61, COD 0.89, TSS 0.64) and SRT (TU 0.83), corresponding to highly polluted localities, which generates complex and severe environmental implications due to the unsustainable management of water resources. Achieving the sustainability of water in the watershed is a challenge that should be shared between society and state. This type of research can be a useful tool in making environmental management decisions.

Water conservation and pollution control for intensive prawn farms

1997 ◽  
Vol 35 (8) ◽  
pp. 77-81 ◽  
Author(s):  
K. K. Chin ◽  
S. L. Ong
Keyword(s):  
Water Quality ◽  
Pollution Control ◽  
Water Conservation ◽  
Rest Period ◽  
Population Increase ◽  
Similar System ◽  
Rapid Urbanization ◽  
Growing Period ◽  
The Past ◽  
Secondary Settling

Hundreds of fish and prawn farms were constructed in the past decades. Many of these farms have ceased operation mainly due to the outbreak of diseases. With population increase, rapid urbanization and industrialization, water quality at the estuary and coastal regions where most of the fish and prawn farms are located is deteriorating. Treatment and recycling of water are essential to maintain the water quality at an acceptable level. A system consisting of preliminary settling, biofiltration, secondary settling and final polishing with a biofilter was tested in an experimental farm. Water quality was maintained at relatively good level at the cultivating pond after 120-day growing period. The growing facilities continued to show good performances after 4 growing cycles with a 2-week rest period between each cycle. Similar system was installed at a 26-hectare farm site having several ponds with sizes varying from 0.7 to 2.5 hectares. No disease outbreak was encountered after the installation of the treatment and recycling facilities.

Spatial–temporal landscape pattern change under rapid urbanization

2019 ◽  
Vol 13 (02) ◽  
pp. 1 ◽  
Author(s):  
Junmei Tang ◽  
Liping Di ◽  
Md. Shahinoor Rahman ◽  
Zhiqi Yu
Keyword(s):  
Landscape Pattern ◽  
Rapid Urbanization ◽  
Pattern Change

Wetland landscape pattern change and its driving forces in Beijing-Tianjin-Hebei region in recent 30 years

2018 ◽  
Vol 38 (12) ◽  
Author(s):  
吕金霞 LÜ Jinxia ◽  
蒋卫国 JIANG Weiguo ◽  
王文杰 WANG Wenjie ◽  
陈坤 CHEN Kun ◽  
邓越 DENG Yue ◽  
...  
Keyword(s):  
Landscape Pattern ◽  
Driving Forces ◽  
Wetland Landscape ◽  
Pattern Change

Dynamic Changes of Landscape Pattern in Coastal Urban Belt in Liaoning

2012 ◽  
Vol 610-613 ◽  
pp. 3765-3770
Author(s):  
Hai De Hu
Keyword(s):  
Landscape Pattern ◽  
Driving Forces ◽  
Field Investigation ◽  
Water Area ◽  
Residential Area ◽  
Remote Sensing Images ◽  
Dynamic Changes ◽  
Class Level ◽  
Salt Pan ◽  
Patch Density

Based on field investigation and social-economical data, in combination with the 1992 and 2007 Landsat TM remote sensing images of Coastal Urban Belt in Liaoning, this paper analyzed the dynamic changes of landscape pattern at both class and landscape levels and their driving forces in the study area. From 1992 to 2007, the landscape pattern in the study area experienced a significant change. At class level, the area of farmland, forestland, wetland, grassland, and abandoned land decreased, while the area of residential area, salt pan, and water area increased. At landscape level, both total number of patches and patch density increased significantly, while the largest patch index decreased, and the complication of landscape shape intensified.

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