scholarly journals Spatial Correlation between Type of Mountain Area and Land Use Degree in Guizhou Province, China

2016 ◽  
Vol 8 (9) ◽  
pp. 849 ◽  
Author(s):  
Yuluan Zhao ◽  
Xiubin Li
Keyword(s):  
Land Use ◽  
Spatial Correlation ◽  
Guizhou Province ◽  
Mountain Area

scholarly journals Spatio-temporal variation of water supply in Guizhou Province, China

Water Policy ◽  
2016 ◽  
Vol 19 (1) ◽  
pp. 181-195 ◽  
Author(s):  
Huiqing Han ◽  
Yuxiang Dong
Keyword(s):  
Land Use ◽  
Water Supply ◽  
Urban Expansion ◽  
Guizhou Province ◽  
Water Yield ◽  
Freshwater Ecosystem ◽  
Yield Model ◽  
Invest Model ◽  
Spatio Temporal ◽  
The Impact

Water supply is an important freshwater ecosystem service provided by ecosystems. Water shortages resulting from spatio-temporal heterogeneity of climate condition or human activities present serious problems in the Guizhou Province of southwest China. This study aimed to analyze the spatio-temporal changes of water supply service using the Integrated Valuation of Ecosystem Services and Tradeoffs (InVEST) model, explore how climate and land-use changes impact water supply provision, and discuss the impact of parameters associated with climate and land-use in the InVEST model on water supply in the region. We used data and the model to forecast trends for the year 2030 and found that water supply has been declining in the region at the watershed scale since 1990. Climate and land-use change played important roles in affecting the water supply. Water supply was overwhelmingly driven by the reference evapotranspiration and annual average precipitation, while the plant evapotranspiration coefficients for each land-use type had a relatively small effect. The method for sensitivity analysis developed in this study allowed exploration of the relative importance of parameters in the InVEST water yield model. The Grain-for-Green project, afforestation, and urban expansion control should be accelerated in this region to protect the water supply.

scholarly journals Quantifying Land Use/Land Cover and Landscape Pattern Changes and Impacts on Ecosystem Services

2019 ◽  
Vol 17 (1) ◽  
pp. 126 ◽  
Author(s):  
Qingjian Zhao ◽  
Zuomin Wen ◽  
Shulin Chen ◽  
Sheng Ding ◽  
Minxin Zhang
Keyword(s):  
Land Use ◽  
Land Cover ◽  
Landscape Heterogeneity ◽  
Landscape Patterns ◽  
Water Bodies ◽  
Guizhou Province ◽  
Land Use Land Cover ◽  
Residential Areas ◽  
Regulatory Policies ◽  
Land Types

Based on satellite remote sensing image, GIS and Fragstats, this study modeled and calculated the dynamic changes of land use, land cover and landscape patterns in Guizhou Province, China, and calculated the changes of ecosystem service values (ESVs). The impacts of the evolution of landscape patterns on the ESVs were analyzed, and reasonable policy recommendations were made. The findings are as follows: (1) In the past two decades, the area of cropland and grassland has decreased; the area of water bodies, urban and rural, industrial and mining, and residential areas has increased; the area of forestland has increased first and then decreased. (2) The two major types of landscapes, cropland and grassland, are clearly being replaced by two land types, forest land and water bodies. (3) Overall, the degree of landscape aggregation and adjacency has decreased, and the landscape heterogeneity has increased. (4) The total amount of ESV in 2000, 2008, 2013 and 2017 was 2574 × 108 Yuan RMB, 2605 × 108 Yuan RMB, 2618 × 108 Yuan RMB and 2612 × 108 Yuan RMB, respectively. The changes of landscape patterns had important impacts on the ESVs. In order to solve the problems caused by the increasingly prominent changes in the landscape patterns and improve the ESVs, it is necessary to rationally plan and allocate land resources, optimize the industrial structures, and develop effective regulatory policies.

scholarly journals Land Use Change and Forest Carbon Sink Assessment in an Alpine Mountain Area of the Veneto Region (Northeast Italy)

2009 ◽  
Vol 29 (2) ◽  
pp. 161-168 ◽  
Author(s):  
Elena Dalla Valle ◽  
Silvia Lamedica ◽  
Roberto Pilli ◽  
Tommaso Anfodillo
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Carbon Sink ◽  
Forest Carbon ◽  
Veneto Region ◽  
Mountain Area

scholarly journals Study on Potential Influence of Runoff on Observatory-Based Watershed in Japan

2019 ◽  
Vol 12 (4) ◽  
pp. 19
Author(s):  
Donglai Ma ◽  
Seiko Yoshikawa ◽  
Yoshiaki Ohsawa ◽  
Tadamasa Saito ◽  
Masahiro Kobayashi ◽  
...  
Keyword(s):  
Land Use ◽  
Pour Point ◽  
Flow Direction ◽  
Weighted Average ◽  
Water Shortage ◽  
Small Scale ◽  
Potential Influence ◽  
Mountain Area ◽  
Point Distance ◽  
Human And Nature

Land use shows the interaction between human and nature, and its impacts especially on runoff have received global attention and required more research studies. However, watershed database is generally available only for very large scales and not yet adapted to small scales. This paper presents a methodology for watershed delineation and potential influence assessment of runoff on the small watersheds in Japan based on the locations of the official observatory point data. Flow direction, flow accumulation, snap pour point and watershed recognition were analyzed by using the D8 algorithm and 10 m × 10 m DEM data of Japan. Totally 3831 watersheds were delineated by defining snapping pour point distance of 50 m as the input value, and the nation-wide watershed database was established. According to the suggestion of Notification No. 521 from the Ministry of Land, Infrastructure and Transport of Japan and land use/land cover data from JAXA satellite Alos-2, comprehensive runoff coefficient (CRC) was calculated by the weighted average method and divided into 10 levels by the equal interval method using ArcGIS. The obtained watershed boundary lines were almost identical to the ridge lines in the mountain area which accounts for more than half of Japan. The CRC values in the biggest cities such as Tokyo and Osaka were the highest, indicating these cities would receive the highest impacts of runoff. These results can provide the technical support for the decision-making on watershed management. The creation of small-scale watershed database would provide basic materials for the subsequent research such as flood prevention, water shortage and biogeochemical cycle of the sustainable regional development.

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