scholarly journals Impact of Urbanization on the Nature of Precipitation at Toronto, Ontario, Canada

2021 ◽  
Vol 60 (4) ◽  
pp. 425-435
Author(s):  
William A. Gough
Keyword(s):  
Freezing Point ◽  
Winter Season ◽  
Precipitation Type ◽  
Urban Heat ◽  
Time Periods ◽  
Impact Of Urbanization ◽  
The Impact ◽  
The City ◽  
Urban Sites ◽  
Precipitation Phase

AbstractA newly developed precipitation phase metric is used to detect the impact of urbanization on the nature of precipitation at Toronto, Ontario, Canada, by contrasting the relative amounts of rain and snow. A total of 162 years of observed precipitation data were analyzed to classify the nature of winter-season precipitation for the city of Toronto. In addition, shorter records were examined for nearby climate stations in less-urbanized areas in and near Toronto. For Toronto, all winters from 1849 to 2010 as well as three climate normal periods (1961–90, 1971–2000, and 1981–2010) were thus categorized for the Toronto climate record. The results show that Toronto winters have become increasingly “rainy” across these time periods in a statistically significant fashion, consistent with a warming climate. Toronto was compared with the other less urban sites to tease out the impacts of the urban heat island from larger-scale warming. This yielded an estimate of 19%–27% of the Toronto shift in precipitation type (from snow to rain) that can be attributed to urbanization for coincident time periods. Other regions characterized by similar climates and urbanization with temperatures near the freezing point are likely to experience similar climatic changes expressed as a change in the phase of winter-season precipitation.

scholarly journals Impact of urbanization on climate change and geographical analysis of physical land use land cover variation using RS-GIS.

2019 ◽  
Vol 21 (2) ◽  
pp. 141-152
Keyword(s):  
Climate Change ◽  
Agricultural Land ◽  
Groundwater Resources ◽  
Mining Area ◽  
Residential Area ◽  
Population Increase ◽  
Impact Of Urbanization ◽  
The Impact ◽  
The City ◽  
Climatic Pattern

<p>This study focuses on the impact of climate change on rainfall-runoff pattern, and to assess the surface runoff and groundwater recharge potential from the intensified rainfall for the effective management of surface and groundwater resources in Tirunelveli city. The rainfall contribution is consistent, dependent, maximum and intensified during the month of November followed by October and December. The intensified rainfall in these months causes a temperature decrease and the climate becomes more and more colder than ever. The indices SPI and DI clear show that there is a change in climatic pattern. Landuse Landcover (LULC) analysis shows that the residential area and mining area is on the increasing trend, Village area is slightly increasing, agricultural area and dense scrub area is on the decreasing trend. The present capacity of the storage tanks available in Tirunelveli city is less than the maximum runoff generated during the month of November. The increase in residential area in LULC reflects the direct linear relation with the population increase of the city. The impact of urbanization leads to LULC change with the loss of agricultural land and water bodies.</p>

scholarly journals Relationship between lake area and distance from the city centre on lake-dependent resident and migratory birds in urban Bangalore, a tropical mega-city in Southern India

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Ravi Jambhekar ◽  
Kulbhushansingh Suryawanshi ◽  
Harini Nagendra
Keyword(s):  
Species Richness ◽  
Migratory Birds ◽  
Bird Species ◽  
Southern India ◽  
City Centre ◽  
Lake Area ◽  
Bird Species Richness ◽  
Impact Of Urbanization ◽  
The Impact ◽  
The City

Abstract Urbanization is one of the major causes of biodiversity loss worldwide. Some species are able to adapt to urbanization, whereas others perish. Studies on long-term effects of the impact of urbanization on species diversity and abundance patterns are especially lacking from tropical cities. We seek to assess the relationship between urbanization and species richness of lake-dependent birds in Bangalore, a tropical mega-city in Southern India. We specifically ask: (i) How is bird species richness related to the size of the lake? (ii) How is bird species richness in Bangalore’s lakes related to the degree of urbanization? We used data from 2014 to 2019, collected from eBird—an online database that collates information on bird observations globally. Both lake area and distance from the city centre are correlated to species richness, with larger lakes supporting more bird species. As distance from the city centre increased (i.e. urbanization decreases), bird richness increased. Overall, in the city of Bangalore, migratory birds have declined while many lake-dependent resident birds seem to be increasing over the past 5 years. We hypothesize that birds that roost and nest in trees appear to be increasing. To confirm this, further research taking a trait-based approach is required. Urbanization appears to have species-specific impacts on lake-dependent birds in this tropical city, with certain groups of birds faring better than others. This research adds to the significant paucity of studies of the impact of urbanization on biodiversity in the urban tropics.

scholarly journals The Impact of Morphological Features on Summer Temperature Variations on the Example of two Residential Neighborhoods in Ljubljana, Slovenia

2017 ◽  
Author(s):  
Alenka Fikfak ◽  
Saja Kosanović ◽  
Miha Konjar ◽  
Janez P. Grom ◽  
Martina Zbašnik-Senegačnik
Keyword(s):  
Thermal Imaging ◽  
Urban Morphology ◽  
Climatic Conditions ◽  
Satellite Imaging ◽  
Summer Temperatures ◽  
Urban Heat ◽  
Study Methodology ◽  
The Impact ◽  
The City

The study conducted in this paper is focused on a predominantly residential area of the City of Ljubljana &ndash; Koseze, which is characterized by generally favorable (bio)climatic conditions. Nonetheless, thermal satellite imaging showed that residential neighborhoods within the Koseze district display unexpected variations in summer temperatures. This observation called into question the benefits of existing bioclimatic features and indicated the need to investigate and compare two neighborhoods with similar urban parameters, with the aim to identify morphological differential characteristics impacting urban heat island (UHI) intensity. By applying the study methodology based on a literature review, surveys of key precedents, detailed mapping in two Koseze locations, in situ measurements, observations and recordings, thermal imaging and the analyses of statistical data, as well as by defining the four main categories of morphological urban parameters &ndash; structure, cover, fabric and metabolism, it was concluded that both neighborhoods have common morphological elements mitigating the UHI effect. Additionally, it was found that the neighborhood with higher UHI intensity has several less favorable features, such as busier roads, larger surface of parking corridors, and the existence of underground parking space. The traffic as an element of urban morphology hence represents the main cause of differences among UHI levels in the two Koseze neighborhoods.

scholarly journals Urbanization and Tourism Development in Bogor City

Society ◽  
2021 ◽  
Vol 9 (1) ◽  
pp. 393-409
Author(s):  
Agustina Multi Purnomo
Keyword(s):  
Tourism Development ◽  
City Tourism ◽  
Indicator Data ◽  
New Perspective ◽  
Impact Of Urbanization ◽  
City Relations ◽  
Tourism Services ◽  
The Impact ◽  
The Relationship ◽  
The City

This study examines the impact of urbanization on tourism development in Bogor City as part of the Jakarta Metropolitan Area (JMA). Previous studies examined the impact of urbanization based on an analysis of urbanization indicators. Inter-city relations in JMA lead to capital and population flows in the form of inter-city migration, development of residential and industrial areas. This study examines the impact of urbanization on tourism development in cities around Jakarta. The argument put forward, urbanization can build a form of city tourism. The study was conducted in Bogor City, a part of JMA, which has experienced urbanization since the royal era and has a variety of tourism services. In contrast to previous research, this study examines urbanization indicator data and the relationship between urbanization history and urbanization indicator data with the development of tourism facilities. The study found that urbanization encourages the development of hotel and restaurant tourism facilities in Bogor City. This is not related to the historical urbanization of the city, other tourism developments, and the relative position of Bogor City among JMA cities. Urbanization encourages the development of tourism facilities through inter-city tourist activity. The research proposes to study the development of tourism facilities as a new perspective on urbanization studies at JMA.

scholarly journals How Would We Cycle Today If We Had the Weather of Tomorrow? An Analysis of the Impact of Climate Change on Bicycle Traffic

2021 ◽  
Vol 13 (18) ◽  
pp. 10254
Author(s):  
Anton Galich ◽  
Simon Nieland ◽  
Barbara Lenz ◽  
Jan Blechschmidt
Keyword(s):  
Climate Change ◽  
Global Climate ◽  
Winter Season ◽  
Model Performance ◽  
Weather Conditions ◽  
Planning And Design ◽  
Validation Procedure ◽  
The Impact ◽  
The City ◽  
Local Weather

Bicycle usage is significantly affected by weather conditions. Climate change is, therefore, expected to have an impact on the volume of bicycle traffic, which is an important factor in the planning and design of bicycle infrastructures. To predict bicycle traffic in a changed climate in the city of Berlin, this paper compares a traditional statistical approach to three machine learning models. For this purpose, a cross-validation procedure is developed that evaluates model performance on the basis of prediction accuracy. XGBoost showed the best performance and is used for the prediction of bicycle counts. Our results indicate that we can expect an overall annual increase in bicycle traffic of 1–4% in the city of Berlin due to the changes in local weather conditions caused by global climate change. The biggest changes are expected to occur in the winter season with increases of 11–14% due to rising temperatures and only slight increases in precipitation.

scholarly journals Validation of UWG and ENVI-Met Models in an Abu Dhabi District, Based on Site Measurements

2019 ◽  
Vol 11 (16) ◽  
pp. 4378 ◽  
Author(s):  
Lindita Bande ◽  
Afshin Afshari ◽  
Dina Al Masri ◽  
Mukesh Jha ◽  
Leslie Norford ◽  
...  
Keyword(s):  
Energy Demand ◽  
Mesoscale Model ◽  
Winter Season ◽  
Weather Generator ◽  
Anthropogenic Heat ◽  
Abu Dhabi ◽  
Seasonal Effect ◽  
The Impact ◽  
Urban Weather ◽  
The City

The city of Abu Dhabi is growing every year in population, urban extent and energy demand. This research focuses on the application of two simulation programs to estimate changes in urban climate associated with continued development in Abu Dhabi: The Urban Weather Generator (UWG) and ENVI-met. Simulation with these two software packages are validated with the site data measured in downtown Abu Dhabi. A comparison analysis (in the different seasons) between the rural data, the simulation output, and the site measurements shows the variations of the UHI in this Middle Eastern city and the potential of the validated tools. The main aims of this study are: (a) to make a seasonal validation of the UWG for the city of Abu Dhabi (referring to urban-rural available data). The tool was previously validated for a year (no seasonal division) for Abu Dhabi, Toulouse, Basel, Singapore, Rome and Barcelona. The simulations are based on the 2016 version of the Urban Weather Generator. The analysis is separated into three main seasons (instead of the full year): winter, spring, summer. (b) To make a seasonal validation and improve the second tool evaluated in this study, ENVI-met 4.0. The software can simulate urban temperature, humidity and wind speed. Guides are proposed for the enhancement of the accuracy of both estimation procedures. Referring to the results, UWG tends to overestimate the canyon temperature during the summer and has a more realistic estimation on the winter season. ENVI-met has better estimations of temperatures during the summer season compared to UWG. Finally, the UWG weather file contributes a more detailed energy model on a mesoscale model. It considers the seasonal effect and shows the impact of the climate on profiling the UHI phenomena. ENVI-met needs improvement in calculating the anthropogenic heat and in calculation of the mean radiant temperature.

scholarly journals Application of physico-chemical indexes and BMWP / Col. to establish the impact of urbanization on Río Frío (Bucaramanga, Colombia)

2018 ◽  
Vol 23 (1) ◽  
pp. 109
Author(s):  
Ricardo Restrepo-Manrique
Keyword(s):  
Water Quality ◽  
Working Party ◽  
Poor Quality ◽  
Environmental Laws ◽  
Physico Chemical ◽  
Impact Of Urbanization ◽  
The Impact ◽  
The City ◽  
Environmental Agency ◽  
Quality Indexes

<p class="abstract"><strong></strong>In this study, samples from four different sites were collected from Río Frío, a stream crossing the city of Bucaramanga (Colombia). The course evaluated started in the suburban area and finished in the vicinity where Río Frío becomes the tributary of Río de Oro. Invertebrates were identified belonging to different phyla: Annelida, Mollusca, and Arthropoda, corresponding to five classes, 14 orders, and 51 families. Biological monitoring working party (BMWP)/Col., ICO, and ICA-CETESB (Environmental Agency of the State of São Paulo) indexes were evaluated to determine water quality and environmental impact caused by urban growth. Statistical analysis of collected data revealed progressive basin deterioration from the first site of collection to the last site. At the beginning of the evaluated course, good water quality was observed. However, after flowing through the urban area, very poor quality indexes were detected. Based on the Wenger <em>et al</em>. guidelines two main problems were identified: weak enforcement of environmental laws, in addition to poorly legislated environmental urban planning.</p>

scholarly journals Understanding the Impact of Urbanization on Surface Urban Heat Islands—A Longitudinal Analysis of the Oasis Effect in Subtropical Desert Cities

2017 ◽  
Vol 9 (7) ◽  
pp. 672 ◽  
Author(s):  
Chao Fan ◽  
Soe Myint ◽  
Shai Kaplan ◽  
Ariane Middel ◽  
Baojuan Zheng ◽  
...  
Keyword(s):  
Longitudinal Analysis ◽  
Urban Heat Islands ◽  
Heat Islands ◽  
Urban Heat ◽  
Impact Of Urbanization ◽  
The Impact ◽  
Oasis Effect

scholarly journals The Impact of landscape composition for urban heat island intensity in Addis Ababa City using Landsat data (1986–2016)

2019 ◽  
Vol 1 ◽  
pp. 1-1
Author(s):  
DMSLB Dissanayake ◽  
Takehiro Morimoto ◽  
Yuji Murayama ◽  
Manjula Ranagalage
Keyword(s):  
Urban Heat Island ◽  
Addis Ababa ◽  
Central Point ◽  
Heat Island ◽  
Multi Temporal ◽  
Urban Rural ◽  
Urban Heat ◽  
Surface Urban Heat Island ◽  
The Impact ◽  
The City

<p><strong>Abstract.</strong> Exploring changes in land use and land cover (LULC) in the city area and its surrounding is important to understand the variation of surface urban heat island (SUHI) and surface urban heat island intensity (SUHII). The SUHII can be calculated based on the local climate zone by using land use and land cover compossition of the city and based on the urban rural zone . The objective of this research is to examine the spatiotemporal changes of LULC and the impact of its composition for the formation of SUHI in Addis Ababa City, Ethiopia based on the urban rural zones.</p><p> The mean center of the central business district of the Addis Ababa City was considered as the central point of the study area. We represented the 30&amp;thinsp;km&amp;thinsp;&amp;times;&amp;thinsp;30&amp;thinsp;km geographical area as a study area with a 15km radius from the central point. As data sources, multi-temporal satellite data provided by the United States Geological Survey (USGS) were used in respect to the years of 1986, 2001, and 2016. In the methodology, we first completed the classification of LULC by using pixel-oriented method for the three years and the validation of the classification has been made. For the classification five LULC classes were identified such as forest, impervious surface, grass land, bare land and crop land. Afterward, land surface temperature (LST) has been computed for three years respectively. Finally, urban rural gradient zones (URGZs) have been generated as a set of polygons with 210m distance in each zone from the central point of the study area. In order to evaluate the SUHII along the URGZs in respect to the LULC, the following analyses were accomplished: (i) the relationship between mean LST and composition of the LULC was computed, (ii) the SUHII was calculated based on the LST variation of main LULC categories and the temperature difference between URGZs, (iii) multi-temporal and multi-directional SUHII was computed, and (iv) linear regression analyses were used to assess the correlations of the mean LST with composition of LULC.</p><p> The results of the analyses show that (i) distribution pattern of SUHII has changed over the study period as results of changes in LULC, and (ii) mean LST gradually declines from city centre to outside of the city , then it can be seen increasing trends due to the effect of bare lands in rural area. This pattern can be seen over the three years as the result of multi-directional approach. The methodology presented will be able to apply other cities which are showing similar growth pattern by making necessary calibration, and our finding can be used as a proxy indicator to introduce appropriate landscape and town planning in a sustainable viewpoint in Addis Ababa City.</p>

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