scholarly journals The Impact of Urbanization on Ecosystem Health in Typical Karst Areas: A Case Study of Liupanshui City, China

2020 ◽  
Vol 18 (1) ◽  
pp. 93
Author(s):  
Yangling Zhao ◽  
Rui Han ◽  
Nan Cui ◽  
Jingbiao Yang ◽  
Luo Guo
Keyword(s):  
Ecosystem Health ◽  
Raw Materials ◽  
Management Policy ◽  
Karst Area ◽  
Karst Region ◽  
Rocky Desertification ◽  
Rapid Urbanization ◽  
Karst Areas ◽  
Impact Of Urbanization ◽  
The Impact

The karst region of Southwest China is one of the largest continuous karst areas in the world, and the ecosystem in the karst region is extremely fragile. The city of Liupanshui, a typical karst area in southwestern China, has provided the main energy and raw materials during China’s rapid urbanization in the past few decades. With the continuous deterioration of the environment in Liupanshui and from the viewpoint of sustainable development strategies, research on ecosystem health (ESH) and the assessments of correlations between urbanization and ESH plays an important role in regional sustainable eco-environmental development. Therefore, the impact of urbanization on the ecosystem health of the study area was discussed in this study using a series of remote sensing images and socio-economic data from 1990 to 2015. Studies showed that Liupanshui is undergoing rapid urbanization, and the growth of urbanized land reached a peak between 2010 and 2015. From 1990 to 2015, the level of ESH in Liupanshui trended downward and then increased. During 2000 to 2010, due to the policy of returning farmland to grassland and forestland, the substantial increase in woodland and grassland and the management policy of mining areas have caused a turn in ESH. Although the value of ecosystem health in 2010–2015 increased, the process of urbanization is rapid, so we should pay more attention to the trend in future ecosystem health changes. The findings revealed that urbanization significantly negatively affects the ecosystem health of Liupanshui, and mining has the greatest impact. Therefore, in future urban development, strengthening the management of resource extraction and the supervision of environmental protection, continuing to return farmland to grassland and forestry, and controlling rocky desertification can improve the health of the urban ecosystem in the study area.

scholarly journals STUDY ON KARST INFORMATION IDENTIFICATION OF QIANDONGNAN PREFECTURE BASED ON RS AND GIS TECHNOLOGY

2018 ◽  
Vol XLII-3 ◽  
pp. 2121-2125
Author(s):  
M. Yao ◽  
G. Zhou ◽  
W. Wang ◽  
Z. Wu ◽  
Y. Huang ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Karst Area ◽  
Karst Region ◽  
Karst Collapse ◽  
Distribution Map ◽  
Visual Interpretation ◽  
Remote Sensing Images ◽  
Karst Rocky Desertification ◽  
Rocky Desertification ◽  
Karst Areas

Karst area is a pure natural resource base, at the same time, due to the special geological environment; there are droughts and floods alternating with frequent karst collapse, rocky desertification and other resource and environment problems, which seriously restrict the sustainable economic and social development in karst areas. Therefore, this paper identifies and studies the karst, and clarifies the distribution of karst. Provide basic data for the rational development of resources in the karst region and the governance of desertification. Due to the uniqueness of the karst landscape, it can’t be directly recognized and extracted by computer in remote sensing images. Therefore, this paper uses the idea of “RS + DEM” to solve the above problems. this article is based on Landsat-5 TM imagery in 2010 and DEM data, proposes the methods to identify karst information research what is use of slope vector diagram, vegetation distribution map, distribution map of karst rocky desertification and other auxiliary data in combination with the signs for human-computer interaction interpretation, identification and extraction of peak forest, peaks cluster and isolated peaks, and further extraction of karst depression. Experiments show that this method achieves the “RS + DEM” mode through the reasonable combination of remote sensing images and DEM data. It not only effectively extracts karst areas covered with vegetation, but also quickly and accurately locks down the karst area and greatly improves the efficiency and precision of visual interpretation. The accurate interpretation rate of karst information in study area in this paper is 86.73 %.

scholarly journals Temporal–Spatial Distribution of Ecosystem Health and Its Response to Human Interference Based on Different Terrain Gradients: A Case Study in Gannan, China

2020 ◽  
Vol 12 (5) ◽  
pp. 1773 ◽  
Author(s):  
Yu Shi ◽  
Rui Han ◽  
Luo Guo
Keyword(s):  
Ecosystem Health ◽  
Negative Impact ◽  
Jiangxi Province ◽  
Spatial Correlations ◽  
Rapid Urbanization ◽  
Human Interference ◽  
The Status ◽  
Urbanization In China ◽  
Impact Of Urbanization ◽  
The Impact

The exploitation, utilization, and protection of land resources are some of the great social problems during the process of rapid urbanization in China. The status of land use directly affects ecosystem health (ESH). The evaluation of ESH and the spatial correlations between urbanization caused by human interference help us to analyze the influence of urbanization on ecosystems and also provide new insight into reasonable and scientific resource management. In this study, we evaluated the ESH of Gannan, in Jiangxi Province, China, based on ecosystem service values (ESV) and selected a series of indicators to detect the impact of urbanization on ecosystem health in 1990, 1995, 2000, 2005, 2010. and 2015. Remote sensing (RS) and the Geographic Information System (GIS) were used as processing tools to calculate basic data and to map the results based on different terrain gradients. The results show that ecosystem health suffered a downward trend from 1990 to 2015. Especially, the area proportion at an unhealthy level and average health (ave-health) level increased prominently, and the area of a well state decreased. Further, the results indicate that urbanization had a negative impact on ESH. The degree of a negative correlation increases with the process of urban sprawl. In addition, we found that from 1990 to 2015, the area proportion of a degraded level and unhealthy level was the highest on the first terrain gradient, and as the terrain gradient increased, this area proportion also decreased. However, the high interference region occupies a higher proportion in the lower terrain gradient. Consequently, the results could reveal the impact of urbanization on ecosystem health and could provide an even more effective service for a sustainable development.

scholarly journals Impact of Urbanization on Ecosystem Health: A Case Study in Zhuhai, China

2019 ◽  
Vol 16 (23) ◽  
pp. 4717 ◽  
Author(s):  
Cui ◽  
Feng ◽  
Han ◽  
Guo
Keyword(s):  
Negative Correlation ◽  
Ecosystem Health ◽  
Environmental Planning ◽  
Urban Ecosystems ◽  
Spatial Correlations ◽  
Rapid Urbanization ◽  
Health Level ◽  
Healthy State ◽  
Impact Of Urbanization ◽  
The Impact

The past decades have witnessed rapid urbanization around the world. This is particularly evident in Zhuhai City, given its status as one of the earliest special economic zones in China. After experiencing rapid urbanization for decades, the level of ecosystem health (ESH) in Zhuhai City has become a focus of attention. Assessments of urban ESH and spatial correlations between urbanization and ESH not only reveal the states of urban ecosystems and the extent to which urbanization affected these ecosystems, but also provide new insights into sustainable eco-environmental planning and resource management. In this study, we assessed the ESH of Zhuhai City using a selected set of natural, social and economic indicators. The data used include Landsat Thematic Mapper images and socio-economic data of 1999, 2005, 2009 and 2013. The results showed that the overall ESH value and ecosystem service function have been on the decline while Zhuhai City has continued to become more urbanized. The total ESH health level trended downward and the area ratio of weak and relatively weak health level increased significantly, while the areas of well and relatively well healthy state decreased since 1999. The spatial correlation analysis shows a distinct negative correlation between urbanization and ESH. The degree of negative correlation shows an upward trend with the processes of urban sprawl. The analysis results reveal the impact of urbanization on urban ESH and provide useful information for planners and environment managers to take measures to improve the health conditions of urban ecosystems.

Analysis of Ecological Service Value in Vulnerable Karst Area of Southwestern Guizhou

2011 ◽  
Vol 347-353 ◽  
pp. 2241-2244
Author(s):  
Feng Tai Zhang ◽  
La Chun Wang ◽  
Wei Ci Su ◽  
Yu Hua Liang ◽  
Ji Xin Shao ◽  
...  
Keyword(s):  
Ecosystem Services ◽  
Ecosystem Service ◽  
Local Economy ◽  
Karst Area ◽  
Karst Region ◽  
Ecosystem Service Value ◽  
Rocky Desertification ◽  
Service Value ◽  
Unit Value ◽  
Southwestern Guizhou

The domestic and foreign evaluations of ecosystem service value are difficult to draw on results accepted by the public and academia. This reflects the research methods are still not mature, need to continue to be improved. In this paper, an attempt has been made to give urban unit value of ecosystem services and set up the values per unit area in southwestern Guizhou of China, in accordance with unit value of global ecosystem services developed by Costanza, et al., Chinese one by Xie, et al. and the actual situation of karst region. The analysis revealed that in the study area, the total ecosystem service value is $1.876×109 in 2006, equivalent to 104.3% of 2006 GDP (Gross Domestic Product), $1.799×109（1US$=7.8136，2006）. If the rocks change into forest in the study area, ecosystem service value will add $0.221×109, equivalent to 12.28% of GDP in 2006. Therefore, we conclude that the ecosystem services value is higher, compared to the local economy. In addition, the rocky desertification area is larger, and has already seriously influenced ecosystem service function. The tasks of ecological environment protection, propaganda and education in this region are of great significance.

scholarly journals The impact of urbanization expansion on agricultural land in Ethiopia: A review

2020 ◽  
Vol 8 (4) ◽  
pp. 73-80
Author(s):  
Assefa Ayele ◽  
Kassa Tarekegn
Keyword(s):  
Urban Areas ◽  
Agricultural Land ◽  
Urban Expansion ◽  
Rural Livelihoods ◽  
Vital Role ◽  
Rapid Urbanization ◽  
Economic Resource ◽  
House Construction ◽  
Impact Of Urbanization ◽  
The Impact

AbstractIn a country like Ethiopia where the vast majority of the populations are employed in agriculture, land is an important economic resource for the development of rural livelihoods. Agricultural land in peri-urban areas is, however, transformed into built-up regions through horizontal urban expansion that has an effect on land use value. In recent years Ethiopia has been experiencing rapid urbanization, which has led to an ever-increasing demand for land in peri-urban areas for housing and other nonagricultural activities that pervades agricultural land. There is a high demand for informal and illegal peri-urban land which has been held by peri-urban farmers, and this plays a vital role in the unauthorized and sub-standard house construction on agricultural land. This urbanization has not been extensively reviewed and documented. In this review an attempt has been made to assess the impacts of rapid urbanization on agricultural activities. Urban expansion has reduced the areas available for agriculture, which has seriously impacted upon peri-urban farmers that are often left with little or no land to cultivate and which has increased their vulnerability. Housing encroachments have been observed to be uncontrolled due to a weak government response to the trend of unplanned city expansion. This has left peri-urban farmers exposed to the negative shocks of urbanization because significant urbanization-related agricultural land loss has a positive correlation with grain production decrease. Appropriate governing bodies should control urban development in order to control the illegal and informal spread of urbanization on agricultural land that threatens food production.

The Dying Water Heritage of Sarkhej Roza

2019 ◽  
Vol 4 (2) ◽  
pp. 141-159
Author(s):  
Gargi Mishra ◽  
Prasenjit Shukla ◽  
Mona Iyer
Keyword(s):  
Fifteenth Century ◽  
Disposal Site ◽  
Archaeological Survey ◽  
Rapid Urbanization ◽  
The Past ◽  
National Importance ◽  
Heritage Site ◽  
Late Twentieth ◽  
Impact Of Urbanization ◽  
The Impact

Sarkhej Roza, a fifteenth century complex comprising of the mausoleum, mosque and cascade of natural and man-made lakes, and located in peri-urban Ahmedabad, Gujarat, India, is presently a heritage site of national importance under the Archaeological Survey of India (ASI). Originally, the Sarkhej lake was excavated to serve the religious purpose of ablution, recreation and climate conditioning that were quite functional until the late twentieth century before rapid urbanization in the catchment of its adjacent interconnected feeder Makarba lake took place. Unfettered development in the past two decades has encroached the common catchment of Makarba–Sarkhej lake cascade by almost 50 per cent. The then perennial sacred Sarkhej lake is now a drying sewage disposal site. Sarkhej Roza has received considerable attention for conserving built heritage aesthetically in the past. Since it is the duty of all stakeholders including ASI, Ahmedabad Municipal Corporation, Sarkhej Roza Committee, civil society and communities to work in harmony towards sustaining their natural heritage, this research has undertaken detailed site and stakeholder assessment to understand challenges faced by the lake and its precincts, and derived learnings from the stakeholder’s perspectives on the impact of urbanization on this water heritage. This was done in order to chart out the possibilities of reviving the Markarba–Sarkhej lake cascade before it is too late.

THE IMPACT OF URBANIZATION ON MURDER RATES AND ON THE GEOGRAPHY OF HOMICIDE IN ENGLAND AND WALES, 1780–1850

2010 ◽  
Vol 53 (3) ◽  
pp. 671-698 ◽  
Author(s):  
PETER KING
Keyword(s):  
Rural Areas ◽  
Rapid Urbanization ◽  
Homicide Rates ◽  
England And Wales ◽  
Large Cities ◽  
Methodological Problems ◽  
Urban And Rural Areas ◽  
And Migration ◽  
Impact Of Urbanization ◽  
The Impact

ABSTRACTAlthough higher murder rates have traditionally been associated with large cities, this view has recently been challenged by several historians who have argued that ‘homicide rates were negatively correlated with urbanisation and industrialisation’, and this is rapidly becoming the new consensus. By exploring the geography of homicide rates for one area undergoing rapid urbanization and industrialization – England and Wales, 1780–1850 – this article challenges this new view and re-assesses the relationship between recorded homicide rates and both modernization and urbanization. After discussing the methodological problems involved in using homicide statistics, it focuses mainly on the first fifteen years for which detailed county-based data is available – 1834–48 – as well as looking at the more limited late eighteenth-century and early nineteenth-century evidence. This data raises fundamental questions about the links historians have recently made between urbanization and low homicide rates, since the remote rural parts of England and Wales generally had very low recorded murder rates while industrializing and rapidly urbanizing areas such as Lancashire had very high ones. Potential explanations for these systematic and large variations between urban and rural areas – including the impact of age structures and migration patterns – are then explored.

scholarly journals Dynamic Evolution of the Ecological Carrying Capacity of Poverty-Stricken Karst Counties Based on Ecological Footprints: A Case Study in Northwestern Guangxi, China

2020 ◽  
Vol 17 (3) ◽  
pp. 991
Author(s):  
Shana Shi ◽  
Baoqing Hu ◽  
Yan Yan ◽  
Xiaoqing Li ◽  
Kaichun Zhou ◽  
...  
Keyword(s):  
Carrying Capacity ◽  
Poverty Rate ◽  
Karst Area ◽  
Karst Region ◽  
Rocky Desertification ◽  
Evolutionary Patterns ◽  
The Sustainable Development ◽  
Ecological Carrying Capacity ◽  
The Status ◽  
Poverty Levels

The karst area in northwestern Guangxi is poor, underdeveloped, and ecologically fragile. It is experiencing rocky desertification, which creates challenges that are more severe than those of other regional ecological environments. In this paper, the ecological footprint (EF) model is used to analyze the ecological carrying capacity (EC) in northwestern Guangxi from 1995 to 2015, and the differences in karst counties with different poverty levels are discussed. The results show that (1) since 1995, the EC of northwestern Guangxi has continued to decrease, the EF has continued to increase, the ecological deficit (ED) has been expanding, and the status of the region has been unsustainable for a long time. (2) The evolutionary patterns, EF and EC of karst counties with different poverty levels are different. The county with the lowest poverty rate has the fastest growth rate of the per capita EF. The county with the largest proportion of karst area has the lowest EC. (3) It is recommended that different types of counties take different measures, including strengthening ecological environment protection, carrying out rocky desertification control and ecological resettlement projects, and reducing energy consumption. This study can provide information for the sustainable development of the karst region and provide decision support for regional poverty alleviation.

Impact of Urbanization and Dietary Patterns on Development of Colorectal Cancer in Indian Population – A Review

2021 ◽  
Vol 16 (8) ◽  
pp. 126-140
Author(s):  
Antara Banerjee ◽  
Sushmitha Sriramulu ◽  
Sarubala Malayaperumal ◽  
Babu Kumar ◽  
Surajit Pathak
Keyword(s):  
Colorectal Cancer ◽  
Food Habits ◽  
Dietary Habits ◽  
Bacterial Flora ◽  
Regional Distribution ◽  
Rapid Urbanization ◽  
Severe Deficiency ◽  
Impact Of Urbanization ◽  
Different Cultures ◽  
The Impact

Urbanization, described as social development, benefits the human population if it is well planned. India contributes major distinctive facets of urbanization which is developing at remarkable rates. The regional distribution of population in India is irregular as only six large states are responsible for half of the urban populaces. India is also known for its different cultures, languages and food habits. Owing to the region-specific food habits, rice is cultivated widely and gives a better yield than the other grains. Pulses that are rich in protein are the next eminent source for people. One of the crucial underlying problems is people give more importance to the taste than nutritional value. As a consequence, immense counts of individuals who can manage to devour a healthy diet do not do so and instances of severe deficiency and malnutrition and certain other gut-associated diseases are seen. Colorectal cancer, which is the most prevailing cancer around the globe, is the major cause of cancer-associated mortality in developing countries. High-fat diet like animal fat that favors the growth of unwanted bacterial flora is the chief threat for colorectal cancer. It is well known that urbanization has fetched several modifications in the lifestyle and food habits which successively enhanced the threat of various diseases. Hence in this review, we focused mainly on the impact of rapid urbanization and other lifestyle and dietary habits on the development of colorectal cancer in India.

Evolution of urbanization and its impact on temperature trends of Quetta city in Pakistan

2020 ◽  
pp. 03-13
Author(s):  
Sajjad Hussain SAJJAD ◽  
Nadège Blond
Keyword(s):  
Time Series Data ◽  
Regional Scale ◽  
Satellite Image ◽  
Winter Season ◽  
Series Data ◽  
Seasonal Temperature ◽  
Rapid Urbanization ◽  
Temperature Trends ◽  
Impact Of Urbanization ◽  
The Impact

Quetta is an important economic, historical and culturally a rich city located in the south-west of Pakistan. Like many other cities of the world, Quetta faced massive urbanization during last three decades. It has 1.1 million populations. The consequences of rapid urbanization in Quetta city are significant through changing urban area’s temperatures than its nearby regional areas as a result of alteration of natural land cover change into built-surfaces at city scale. In this context, the objective of this study is to explore the effect of urbanization on variability of minimum (dTn) and maximum (dTx) temperature trends of Quetta city by comparing with non-urban regional stations. For this purpose, first the evolution of urbanization during 1980s to 2013 was analysed by using satellite image processing techniques for the years 1989, 2000 and 2013. To study the impact of urbanization on dTn and dTx of Quetta city, the time series data of daily average monthly minimum (Tn) and maximum (Tx) temperatures ranging from 1947 to 2013 of Quetta city and the seven regional stations were analysed by using linear regression. The results show that during last twenty years, urban population and urban surface area increased to 80% and 194%, respectively. The variation in annual and seasonal temperature trends depicted that Tn and Tx at Quetta city are increasing more than the regional stations and Tn increased faster than Tx at urban and regional scale except winter season.

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