scholarly journals Impact of Settlement Growth on Yenagoa’s Urban Environment

2021 ◽  
Vol 2 (1) ◽  
pp. 24-29
Author(s):  
E. E. Imaitor-Uku ◽  
O. B. Owei ◽  
L. Hart ◽  
A. Ayotamuno
Keyword(s):  
Land Use ◽  
Urban Environment ◽  
Sustainable Land Use ◽  
Mapping Technique ◽  
Citizen Education ◽  
Management Framework ◽  
Urban Planning And Development ◽  
Spatio Temporal ◽  
The City ◽  
Settlement Growth

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.  

scholarly journals Spatio-Temporal Reorganization of Cropland Development in Central Asia during the Post-Soviet Era: A Sustainable Implication in Kazakhstan

2018 ◽  
Vol 10 (11) ◽  
pp. 4042 ◽  
Author(s):  
Wei Wei ◽  
Yuanjun Zhu ◽  
Hao Li ◽  
Kebin Zhang ◽  
Baitian Wang ◽  
...  
Keyword(s):  
Land Use ◽  
Food Security ◽  
Soviet Union ◽  
Policy Making ◽  
Security Policy ◽  
National Level ◽  
European Space Agency ◽  
Sustainable Land Use ◽  
Rapid Urbanization ◽  
Spatio Temporal

The abandonment and cultivation of croplands in the Eurasian Steppe has become the focus of global and regional food security and agricultural policy-making. A large area of cropland in some post-Soviet countries has proven to be abandoned with the disintegration of the Soviet Union; however, it is unclear as to whether Kazakhstan also experienced a similar change as one of the main food providers for the former Soviet Union. In this study, we used the annual land cover dataset (1992–2015) from the European Space Agency, Climate Change Initiative (ESA-CCI) to detect spatio-temporal characteristics of rainfed and irrigated cropland changes in Kazakhstan. The Mann–Kendall test and regime shift analysis showed that rainfed and irrigated cropland at national level had a significant increasing trend with a significant rising up to 1999 and stagnation during 2000–2015, which was further confirmed with analysis at 14 regions. The greatest contributor to rainfed and irrigated croplands was steppes, followed by shrinkage of water bodies since 2005 to a great extent, rapid urbanization process resulted in losses of a part of irrigated oases. The trend surface analysis indicated that reorganized stable pattern characterized by rainfed cropland in north and irrigated cropland in south was driven by the strategy of the gradual agricultural development of oases. The nonexistence of cycle between the abandonment and recultivation proved that newly-gained cropland from steppe may be less degraded and more productive for sustainable land use in Kazakhstan. In conclusion, this study can provide strong evidence for sustainable land use and a basis for food security policy-making in Kazakhstan, and even all of the Central Asian countries in the future.

scholarly journals Added Value of Vaisala AQT530 Sensors as a Part of a Sensor Network for Comprehensive Air Quality Monitoring

2021 ◽  
Vol 9 ◽  
Author(s):  
Tuukka Petäjä ◽  
Aino Ovaska ◽  
Pak Lun Fung ◽  
Pyry Poutanen ◽  
Jaakko Yli-Ojanperä ◽  
...  
Keyword(s):  
Air Quality ◽  
Urban Environment ◽  
Sensor Network ◽  
Temporal Variability ◽  
Trace Gases ◽  
Fine Tuning ◽  
Added Value ◽  
Wood Combustion ◽  
Spatio Temporal ◽  
The City

Poor air quality influences the quality of life in the urban environment. The regulatory observation stations provide the backbone for the city administration to monitor urban air quality. Recently a suite of cost-effective air quality sensors has emerged to provide novel insights into the spatio-temporal variability of aerosol particles and trace gases. Particularly in low concentrations these sensors might suffer from issues related e.g., to high detection limits, concentration drifts and interdependency between the observed trace gases and environmental parameters. In this study we characterize the optical particle detector used in AQT530 (Vaisala Ltd.) air quality sensor in the laboratory. We perform a measurement campaign with a network of AQT530 sensors in Helsinki, Finland in 2020–2021 and present a long-term performance evaluation of five sensors for particulate (PM10, PM2.5) and gaseous (NO2, NO, CO, O3) components during a half-year co-location study with reference instruments at an urban traffic site. Furthermore, short-term (3–5 weeks) co-location tests were performed for 25 sensors to provide sensor-specific correction equations for the fine-tuning of selected pollutants in the sensor network. We showcase the added value of the verified network of 25 sensor units to address the spatial variability of trace gases and aerosol mass concentrations in an urban environment. The analysis assesses road and harbor traffic monitoring, local construction dust monitoring, aerosol concentrations from fireworks, impact of sub-urban small scale wood combustion and detection of long-range transport episodes on a city scale. Our analysis illustrates that the calibrated network of Vaisala AQT530 air quality sensors provide new insights into the spatio-temporal variability of air pollution within the city. This information is beneficial to, for example, optimization of road dust and construction dust emission control as well as provides data to tackle air quality problems arising from traffic exhaust and localized wood combustion emissions in the residential areas.

scholarly journals SUSTAINABLE LAND USE EVALUATION BASED ON PRESERVATIVE APPROACH

2019 ◽  
Vol XLII-2/W11 ◽  
pp. 653-660
Author(s):  
S. Khademi ◽  
M. Norouzi ◽  
M. Hashemi
Keyword(s):  
Land Use ◽  
Sustainable Development ◽  
Urban Planning ◽  
Land Use Planning ◽  
Urban Land ◽  
Sustainability Indicators ◽  
Urban Land Use ◽  
Sustainable Land Use ◽  
Ancient Monuments ◽  
The City

<p><strong>Abstract.</strong> Determining the manner of land-use and the spatial structure of cities on the one hand, and the economic value of each piece of land on the other hand, land-use planning is always considered as the main part of urban planning. In this regard, emphasizing the efficient use of land, the sustainable development approach has presented a new perspective on urban planning and consequently on its most important pillar, i.e. land-use planning. In order to evaluate urban land-use, it has been attempted in this paper to select the most significant indicators affecting urban land-use and matching sustainable development indicators. Due to the significance of preserving ancient monuments and the surroundings as one of the main pillars of achieving sustainability, in this research, sustainability indicators have been selected emphasizing the preservation of ancient monuments and historical observance of the city of Susa as one of the historical cities of Iran. It has also been attempted to integrate these criteria with other land-use sustainability indicators. For this purpose, Kernel Density Estimation (KDE) and the AHP model have been used for providing maps displaying spatial density and combining layers as well as providing final maps respectively. Moreover, the rating of sustainability will be studied in different districts of the city of Shush so as to evaluate the status of land sustainability in different parts of the city. The results of the study show that different neighborhoods of Shush do not have the same sustainability in land-use such that neighborhoods located in the eastern half of the city, i.e. the new neighborhoods, have a higher sustainability than those of the western half. It seems that the allocation of a high percentage of these areas to arid lands and historical areas is one of the main reasons for their sustainability.</p>

Spatio-Temporal Zoning of the Urban Lands’ Functioning for Ensuring the Sustainable Development of the City

2019 ◽  
Vol 10 (1) ◽  
pp. 210
Author(s):  
Yuri Mikhailovich ROGATNEV ◽  
Valentina Nikolaevna SCHERBA ◽  
Olga Sergeevna NAZAROVA ◽  
Tatyana Anatolevna FILIPPOVA ◽  
Olga Nikolaevna DOLMATOVA
Keyword(s):  
Land Use ◽  
Oil And Gas ◽  
Living Environment ◽  
Socioeconomic Indicators ◽  
The Sustainable Development ◽  
Property Relations ◽  
Territorial Planning ◽  
Spatio Temporal ◽  
Land Use Development ◽  
The City

The problems of the modern land use development in the cities located in the oil and gas producing Siberian regions of Russia are reviewed in the article. The modern scientific ideas about the role of the modern land and property assets in small and medium-sized cities in adverse climatic living environment are explored for this purpose. The study is aimed at improving the method for assessing the current organization of the land use in the municipal city of Nefteyugansk. The methodological provisions of land zoning with due consideration for its socioeconomic value and temporal changes are developed. The methodological provisions for a comprehensive assessment of the land use conditions aimed at using the spatio-temporal land zoning model are improved. The results of the study can be used in the practice of local authorities and legal entities in urban planning, land and property relations, housing and utility services in territorial planning, development of land and property relations in the market conditions, improvement of the land payment system, determination of the land investment attractiveness, and creation of a unified basis for an objective land plot evaluation. The introduction of the results of the study into practice will allow to increase the efficiency of the land use, increase its value, and bring the socioeconomic indicators of the land and property assets of the city to a higher level.

scholarly journals Spatio-temporal Assessment of Land Use/ Land Cover Dynamics and Urban Heat Island of Jaipur City using Satellite Data

2014 ◽  
Vol XL-8 ◽  
pp. 767-772 ◽  
Author(s):  
S. Jalan ◽  
K. Sharma
Keyword(s):  
Land Use ◽  
Land Cover ◽  
Surface Temperature ◽  
Land Surface ◽  
Heat Island ◽  
Land Use Land Cover ◽  
Urban Heat ◽  
Spatio Temporal ◽  
The City ◽  
Jaipur City

Urban Heat Island (UHI) refers to the phenomena of higher surface temperature occurring in urban areas as compared to the surrounding countryside attributable to urbanization. Spatio-temporal changes in UHI can be quantified through Land Surface Temperature (LST) derived from satellite imageries. Spatial variations in LST occur due to complexity of land surface – combination of impervious surface materials, vegetation, exposed soils as well as water surfaces. Jaipur city has observed rapid urbanization over the last decade. Due to rising population pressure the city has expanded considerably in areal extent and has also observed substantial land use/land cover (LULC) changes. The paper aims to determine changes in the LST and UHI phenomena for Jaipur city over the period from 2000 to 2011 and analyzes the spatial distribution and temporal variation of LST in context of changes in LULC. Landsat 7 ETM+ (2000) and Landsat 5 TM (2011) images of summer season have been used. Results reveal that Jaipur city has witnessed considerable growth in built up area at the cost of greener patches over the last decade, which has had clear impact on variation in LST. There has been an average rise of 2.99 &deg;C in overall summer temperature. New suburbs of the city record 2&deg; to 4 &deg;C increase in LST. LST change is inversely related to change in vegetation cover and positively related to extent of built up area. The study concludes that UHI of Jaipur city has intensified and extended over new areas.

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

Aerobiologia ◽  
2019 ◽  
Vol 36 (1) ◽  
pp. 77-81
Author(s):  
Palak Balyan ◽  
Chirashree Ghosh ◽  
Shukla Das ◽  
B. D. Banerjee
Keyword(s):  
Land Use ◽  
Urban Environment ◽  
Spatio Temporal
Sign in / Sign up

Export Citation Format

Share Document