Spatio-temporal characterisation of bioaerosols at diverse outdoor land-use sites in an urban environment

This research is a study on the assessment of settlement growth and its impact on the urban environment in Yenagoa Metropolis. Landsat imageries of 1988, 1996, 2004, 2012 and 2020 were acquired from the United Sates Geographical Survey. Supervised image classifications using level 1 classification scheme was adopted to extract LandUse/LandCover. The five Epochs of images were used to extract the built-up areas, water bodies and vegetation areas. The area (ha) of land use for each epoch was determined using clipping images. The spatio-temporal changes were determined as a percentage of LULC per epoch and which was done following standard methods. Mapping technique was used to compare satellite imageries. Findings showed that built up areas was 1,279.81 in 1988, 2,497.87 in 1996, 4,554.73 in 2009, 7,804.30 in 2012 and 10,447.50 in 2020. While the percentage change of built-up are in 1988 was 6.12%, 1996 was 11.94%, 2004 was 21.78%, 2012 was 34.31% and 2020 was 30.09%, respectively. It is therefore recommended here that government should empower urban planning and development agencies, legally and financially to carry out their responsibility to implement existing master plan of the city. Engage in citizen education on how to contribute in managing the environment and sustainable land use management framework in the study area for proper management of the urban environment to enhance sustained settlement growth in the city.

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Spatio-Temporal Transformations in General Land Use in Latur and Nilanga Tahsil 1993-1996 to 2010-13

International Journal for Research in Applied Science and Engineering Technology ◽

10.22214/ijraset.2017.8028 ◽

2017 ◽

Vol V (VIII) ◽

pp. 193-200

Author(s):

Mr. O.W. Jadhav

Keyword(s):

Land Use ◽

Spatio Temporal

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Recessive Transition Mechanism of Arable Land Use Based on the Perspective of Coupling Coordination of Input–Output: A Case Study of 31 Provinces in China

Land ◽

10.3390/land10010041 ◽

2021 ◽

Vol 10 (1) ◽

pp. 41

Author(s):

Yi Lou ◽

Guanyi Yin ◽

Yue Xin ◽

Shuai Xie ◽

Guanghao Li ◽

...

Keyword(s):

Land Use ◽

Evaluation Model ◽

Arable Land ◽

Temporal Trends ◽

Mainland China ◽

Input Output ◽

Transition Mechanism ◽

Input And Output ◽

Spatio Temporal ◽

Arable Land Use

In the rapid process of urbanization in China, arable land resources are faced with dual challenges in terms of quantity and quality. Starting with the change in the coupling coordination relationship between the input and output on arable land, this study applies an evaluation model of the degree of coupling coordination between the input and output (D_CCIO) on arable land and deeply analyzes the recessive transition mechanism and internal differences in arable land use modes in 31 provinces on mainland China. The results show that the total amount and the amount per unit area of the input and output on arable land in China have presented different spatio-temporal trends, along with the mismatched movement of the spatial barycenter. Although the D_CCIO on arable land increases slowly as a whole, 31 provinces show different recessive transition mechanisms of arable land use, which is hidden in the internal changes in the input–output structure. The results of this study highlight the different recessive transition patterns of arable land use in different provinces of China, which points to the outlook for higher technical input, optimized planting structure, and the coordination of human-land relationships.

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Spatio-Temporal Change of Land Use in a Coastal Reclamation Area: A Complex Network Approach

Sustainability ◽

10.3390/su13168690 ◽

2021 ◽

Vol 13 (16) ◽

pp. 8690

Author(s):

Caiyao Xu ◽

Lijie Pu ◽

Fanbin Kong ◽

Bowei Li

Keyword(s):

Land Use ◽

Complex Network ◽

Coastal Wetland ◽

Eastern China ◽

Wetland Ecosystems ◽

Ecological Protection ◽

Land Use Types ◽

Coastal Reclamation ◽

Reclamation Area ◽

Spatio Temporal

Coastal ecological protection and restoration projects aimed to restore and recover the ecological environment of coastal wetland with high-intensity human reclamation activity, while the integrity of the coastal wetland system with human reclamation activity and the ability of individual land use types to control the overall system were not fully considered. In this study, a six-stage land use conversion network was constructed by using a complex network model to analyze coastal land use dynamic changes in the coastal reclamation area located in eastern China from 1977 to 2016. The results showed that land use types had gradually transformed from being dominated by natural types to artificial types, and the speed of transformation was accelerating. The proportion of un-reclaimed area decreased from 93% in 1977 to 46% in 2007, and finally fell to 8% in 2014 and 2016. Tidal flat and halophytic vegetation were the main output land use types, while cropland, woodland and aquaculture pond were the main input land use types. Cropland had the highest value of betweenness centrality, which played a key role in land use change from 1992 to 2014. The land use system of the coastal reclamation area was the most stable in 2002–2007, followed by 1984–1992, and the most unstable in 2007–2014. The Chinese and local government should carry out some measures to improve the land use in coastal wetland ecosystems, including the allocation and integration of land use for production space, living space, and ecological space, and develop multi-functionality of land use to realize the coastal high-quality development and coastal ecological protection and restoration.

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

Water Policy ◽

10.2166/wp.2016.036 ◽

2016 ◽

Vol 19 (1) ◽

pp. 181-195 ◽

Cited By ~ 3

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.

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