Effect of postmining land use on the spatial distribution of metal(loid)s and their transport in agricultural soils: Analysis of a case study of Chungyang, South Korea

2016 ◽  
Vol 170 ◽  
pp. 157-166 ◽  
Author(s):  
Sung-Wook Yun ◽  
Philippe C. Baveye ◽  
Kweon-Bo Kim ◽  
Dong-Hyeon Kang ◽  
Si-Young Lee ◽  
...  
Keyword(s):  
Land Use ◽  
Spatial Distribution ◽  
South Korea ◽  
Agricultural Soils

Spatial Distribution and Evaluation of Cadmium in Agricultural Soils Based on GIS: A Case Study of Chaoyang City in China

2012 ◽  
Vol 518-523 ◽  
pp. 2806-2811
Author(s):  
Wen Juan Jia ◽  
Ying Yan ◽  
Ying Su ◽  
Ming Da Liu
Keyword(s):  
Spatial Distribution ◽  
Agricultural Soil ◽  
Agricultural Soils ◽  
Geoaccumulation Index ◽  
Pollution Index ◽  
Average Concentration ◽  
Soil Samples ◽  
Soil Environment ◽  
Index Method

To identify the concentration and spatial distribution of cadmium (Cd) in agricultural soils, 207 soil samples were collected from Chaoyang and analyzed based on pollution index methods and GIS. The concentration of Cd in the soils of Chaoyang ranged from 0.030 to 0.687 mg/kg, with an average concentration of 0.246 mg/kg. The evaluated results of Cd in agricultural soils of Chaoyang shows that the pollution excess rate is 2.90%, the total agricultural soil environment of Cd was still clean, but some areas were accumulated by Cd. The differences between two evaluated methods indicate that evaluated criteria had a direct impact on the evaluation results, compared to integrated pollution index, the Geoaccumulation index method was more accurate and objective.

scholarly journals Spatial Pattern Simulation of Land Use Based on FLUS Model under Ecological Protection: A Case Study of Hengyang City

2021 ◽  
Vol 13 (18) ◽  
pp. 10458
Author(s):  
Chuchu Zhang ◽  
Peng Wang ◽  
Pingsheng Xiong ◽  
Chunhong Li ◽  
Bin Quan
Keyword(s):  
Land Use ◽  
Spatial Distribution ◽  
Prediction Method ◽  
Distribution Area ◽  
Kappa Index ◽  
Land Type ◽  
Marginal Areas ◽  
Ecological Protection ◽  
Regulation Function

With rapid economic development in China, the excessive expansion of cities has led to the imbalance of land use structure, and then the ecological regulation function of the land ecosystem experiences problems, which has become an obstacle to sustainable development. Therefore, in order to protect the ecological environment, regulate urban development and pursue the maximization of ecological benefits, it is necessary to analyze, simulate and predict land use change. In this study, Hengyang City was taken as the study area, and based on the current land use data of Hengyang City in 2010, 2015, and 2018, the land use type transfer during 2010–2015 and 2015–2018 was analyzed. Then, starting from 2010, the FLUS model was used to simulate the spatial distribution of land use in 2015 and 2018, and then the spatial distribution of land use in Hengyang City in 2025 was predicted with the Markov prediction method under the premise of ecological protection priority. The results show that the change in ecological land in Hengyang City is mainly distributed in the surrounding and marginal areas, because the topography of Hengyang City is a basin. Changes in land type in Hengyang City in 2015 were subtle and difficult to observe. However, in 2018, the transformation of non-ecological land into ecological land was obvious, and the distribution area of ecological land expanded significantly. The Kappa index of the results simulated by the FLUS model based on neural network is above 0.72, and overall accuracy is above 0.9, which is highly consistent with the actual situation. It is reasonable and convincing to predict the spatial distribution of land use in the context of ecological protection. The predicted results can be useful for urban planning and land use distribution and provide a reference for relevant decision-makers.

scholarly journals Conversion of agricultural soils in Austria—a case study for a community in Upper Austria

2020 ◽  
Vol 71 (2) ◽  
pp. 69-76
Author(s):  
Günther Aust ◽  
Franz Heinrich ◽  
Daniel Horvath ◽  
André Musil ◽  
Cecilie Foldal ◽  
...  
Keyword(s):  
Land Use ◽  
Forest Cover ◽  
Agricultural Land ◽  
Agricultural Soils ◽  
Local Population ◽  
Soil Survey ◽  
Settlement Area ◽  
Soil Sealing ◽  
Upper Austria

SummaryWe have analyzed the loss of agricultural land in a case study of the community Eggelsberg in the Innviertel in Upper Austria. The trigger for the project was the attribution of Austria as Europe’s leader in soil sealing. We compared the results of the Austrian agricultural soil survey of the 1970s with the actual land use and quantified the land use change. Within half a century, 15% of the agricultural area was converted to settlement area or to other forms of infrastructure. According to the original soil assessment, 96 ha of high-quality cropland, 1,220 ha of medium-quality cropland, 121 ha of low-quality cropland, and 409 ha of grassland were converted. The forest cover remained stable. The highest share of soil sealing was owed to the expansion of the settlement area and the construction of a successful enterprise. Minor contributions were expansions of farm buildings. The loss of agricultural land was reasonable and reflected the needs of the local population. A special protection status because of the future relevance of the agricultural land was not communicated to land managers and is not reflected in the market prices of agricultural products. The relevance of the agricultural land beyond the regional level is not fully recognized.

Factors of Spatial Distribution of Recreation Areas in Peri-Urban Beijing

2012 ◽  
pp. 72-90
Author(s):  
Jiaming Liu
Keyword(s):  
Land Use ◽  
Spatial Distribution ◽  
Environmental Conditions ◽  
Land Price ◽  
Market Growth ◽  
Recreation Areas ◽  
Tourism Attractions ◽  
Urban Recreation ◽  
Spatial Governance

With the increase of disposable income and leisure time, recreation has become an important lifestyle of urban residents in China. Peri-urban recreation areas, as the important one, could not only meet the outdoor recreational demands of both tourists and residents, but also contribute to sustaining urban ecological security. Rational spatial patterns for recreational land use will mediate the contradictions between urban sprawl and natural preservation, and, economic growth and social development. Based on the case study of peripheral urban areas in Beijing, this chapter aims to identify the factors which will influence the spatial distribution of peri-urban recreation areas, by analyzing the collected data from questionnaires, online survey, documentation and field investigations. In order to achieve sound information, relevant data from different management departments, owners and land-use types involved in the case study area is collected. A sampling database for peri-urban recreation areas in Beijing is established, and GIS spatial analyses as well as statistic analyses are applied. The result indicates that spatial distribution of recreation areas is majorly influenced by four factors, e.g. tourism attractions and environmental conditions, policy and spatial governance, consumption demand and preference, land price and availability. The influencing mechanism of each factor towards different type of recreation areas is various. Tourism attractions and environmental conditions are dominant factors for public recreation areas. Commercial recreation areas are highly related with accessibility. Agricultural recreation areas are usually attached to special farmlands near large-scaled scenic areas. Meanwhile, recreational business clusters have appeared in suburbs influenced by mass recreation market growth. Controlled by the land price, commercial recreation areas are differentiated on their scales and developing intensity. Policy and spatial governance have made arrangements of recreation areas more balancing and more human-oriented. A peri-urban recreation area model is therefore established on basis of this analysis, which can guide urban planning and designing, land-use planning and recreation resource development.

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