scholarly journals Modeling pollution potential input from the drainage basin into Barra Bonita reservoir, São Paulo – Brazil

2015 ◽  
Vol 75 (2) ◽  
pp. 314-323 ◽  
Author(s):  
RB. Prado ◽  
EMLM. Novo
Keyword(s):  
Land Use ◽  
Spatial Distribution ◽  
Land Cover ◽  
Drainage Basin ◽  
Sao Paulo ◽  
São Paulo ◽  
Land Use Land Cover ◽  
Pollution Potential ◽  
Modeling Tools ◽  
Reservoir Basin

In this study multi-criteria modeling tools are applied to map the spatial distribution of drainage basin potential to pollute Barra Bonita Reservoir, São Paulo State, Brasil. Barra Bonita Reservoir Basin had undergone intense land use/land cover changes in the last decades, including the fast conversion from pasture into sugarcane. In this respect, this study answers to the lack of information about the variables (criteria) which affect the pollution potential of the drainage basin by building a Geographic Information System which provides their spatial distribution at sub-basin level. The GIS was fed by several data (geomorphology, pedology, geology, drainage network and rainfall) provided by public agencies. Landsat satellite images provided land use/land cover map for 2002. Ratings and weights of each criterion defined by specialists supported the modeling process. The results showed a wide variability in the pollution potential of different sub-basins according to the application of different criterion. If only land use is analyzed, for instance, less than 50% of the basin is classified as highly threatening to water quality and include sub basins located near the reservoir, indicating the importance of protection areas at the margins. Despite the subjectivity involved in the weighing processes, the multi-criteria analysis model allowed the simulation of scenarios which support rational land use polices at sub-basin level regarding the protection of water resources.

scholarly journals Update of land use/land cover and soil texture for Brazil: impact on WRF modeling results over São Paulo

2021 ◽  
pp. 118760
Author(s):  
Rizzieri Pedruzzi ◽  
Willian Lemker Andreão ◽  
Bok Haeng Baek ◽  
Anderson Paulo Hudke ◽  
Timothy William Glotfelty ◽  
...  
Keyword(s):  
Land Use ◽  
Land Cover ◽  
Soil Texture ◽  
Sao Paulo ◽  
São Paulo ◽  
Land Use Land Cover ◽  
Wrf Modeling

scholarly journals Effect of Land Use/Land Cover Change on Groundwater Recharge in Osun Drainage Basin, Nigeria

2019 ◽  
Vol 28 (3) ◽  
pp. 381-394
Author(s):  
E. D. Ashaolu ◽  
J. F. Olorunfemi ◽  
I. P. Ifabiyi
Keyword(s):  
Land Use ◽  
Land Cover ◽  
Groundwater Recharge ◽  
Land Cover Change ◽  
Drainage Basin ◽  
Groundwater Resources ◽  
Land Development ◽  
Land Use Land Cover ◽  
Rock Outcrops ◽  
Groundwater System

Osun drainage basin is one of the regions in Nigeria experiencing increasing population growth and rapid urbanization; and about 70% of the inhabitantsrely on shallow groundwater resources of the region. Change in land use/land cover is one of the significant factors controlling regional hydrology and groundwater resources, thus the continuous change in land use and land cover of the drainage basin will significantly affect the basin’s groundwater resources. There are 7 classified land use/land cover in the study area which are bare surfaces, built up area, crops/shrubs, forest, rock outcrops, water bodies and wetland. Applying WetSpass-M hydrological model, we predicted the effect of land use/land cover change on the groundwater recharge in Osun drainage basin, Nigeria between 1984-2015. The results revealed that the highest groundwater recharge of 48.56%, 33.64% and 37.29% occurred in forested area in 1984, 2000 and 2015, respectively. This result might be due to the influence of vegetation in slowing down the speed of running water across the forest area, that allows more infiltration and deep percolation into the water table to recharge the groundwater system. On the other hand, the least groundwater recharge of the total annual was on the rock outcrops, which are about 4% in 1984, 3% in 2000 and 2% in 2015. The least recharge found on rock outcrops is expected and may be attributed to the fact that infiltration can only occur around or on decomposed rock outcrop, which may result in minute recharge to the groundwater system. The mean annual groundwater recharge of the basin for the land use/land cover of 1984, 2000 and 2015 are476.54, 411.07 and 430.06 mm/y, respectively. Overall, for the 32 years period of investigation, change in land use/land cover accounts for only 10% reduction in mean groundwater recharge occurrence between 1984 and 2015. Also, there is a change in recharge pattern in the study area during this period because most often, change in land use/land cover is a transition from one land use/land cover class to another, and the recharge pattern is influenced based on the degree of transition that took place and the characteristics of the dominant land use/land cover at a particular area of the basin. Although, the 10% reduction in mean annual recharge appears minute, this might become pronounced if the current rate of deforestation in the drainage basin continues unabated. Therefore, proper land use allocation, regulated land development and afforestation in terms of planting of native trees that were lost through anthropogenic activities in the basin should be policy option for groundwater sustainability.

scholarly journals Assessing the Spatio-Temporal Pattern of Land Use and Land Cover Changes in Osun Drainage Basin, Nigeria

2019 ◽  
Vol 12 (1-2) ◽  
pp. 41-50 ◽  
Author(s):  
Eniola Damilola Ashaolu ◽  
Jacob Funso Olorunfemi ◽  
Ifatokun Paul Ifabiyi
Keyword(s):  
Land Use ◽  
Land Cover ◽  
Temporal Pattern ◽  
Forest Cover ◽  
Drainage Basin ◽  
Anthropogenic Activities ◽  
Satellite Image ◽  
Land Use Land Cover ◽  
Lulc Change ◽  
Spatio Temporal

Abstract Over the years, Osun drainage basin has witnessed tremendous increase in population, and urbanization that have changed the landscape of the area. This study evaluated the spatio-temporal pattern of land use/land cover change (LULC) in the study area, and made hydrological inferences. Landsat imageries were acquired from USGS-EROS satellite image database for the period 1984, 2000 and 2015, while the Digital Elevation Model (DEM) was obtained from Shuttle Radar Topography Mission (SRTM) of the National Aeronautics and Space Agency (NASA). Supervised image classification using the Maximum Likelihood Algorithm in Erdas Imagine was adopted to classified the land use/land cover of the study area into seven classes. Elevation, aspect and slope of the study area were processed from DEM using ArcGIS. Modules for Land Use Change Evaluation (MOLUSCE) plugin in QGIS was used to simulate the basin future LULC change, using change driving factors of population, elevation, aspect and slope of the study area. There was about 234% increase in built up areas and 89.22% in crop/shrubs between 1984 and 2015. The most significant decrease in LULC occurred in forest (58.75%) and wetland (84.69%) during this period. The predicted future LULC change suggests that only about 12% of the basin will remain under forest cover by the year 2046. The results underscored the increasing anthropogenic activities in the basin that influenced recharge rate, surface runoff, incidences of soil erosion, etc., in Osun drainage basin. The planting of the lost native trees was recommended for the sustainability of the basin’s ecosystem.

scholarly journals Analysis and Projection of Land-Use/Land-Cover Dynamics through Scenario-Based Simulations Using the CA-Markov Model: A Case Study in Guanting Reservoir Basin, China

2020 ◽  
Vol 12 (9) ◽  
pp. 3747 ◽  
Author(s):  
Gebdang B. Ruben ◽  
Ke Zhang ◽  
Zengchuan Dong ◽  
Jun Xia
Keyword(s):  
Land Use ◽  
Sustainable Development ◽  
Land Cover ◽  
Markov Model ◽  
Water Body ◽  
Land Use Land Cover ◽  
Lulc Change ◽  
Guanting Reservoir ◽  
Reservoir Basin ◽  
Business As Usual

Understanding the rate and process of land-use/land-cover (LULC) change in a watershed is essential for managing natural resources and achieving sustainable development. Therefore, this study aims to analyze historical LULC change from 1980 to 2010 and project future changes in 2030, 2060, and 2090 in the Guanting Reservoir Basin (GRB), China, a critical water-supplying watershed for China’s capital Beijing, through scenario-based simulations. Two LULC scenarios, ‘business-as-usual’ and ‘governance’ (Gov), were projected using the Cellular Automata-Markov (CA–Markov) model. Historical LULC trend analysis shows that built-up land increased from 2.6% in 1980 to 5.26% in 2010, while cropland, grassland, and water body decreased. LULC conversion analysis indicates that, in general, grassland, cropland, and woodland were converted to built-up area from 1980 to 2010. The BAU scenario projects a dramatic increase in built-up area, rising from 2296.98 km2 (5.26%) in 2010 to 11,757.35 km2 (26.93%) in 2090 at the expense of cropland and grassland areas. Conversely, the Gov scenario predicts an increase in water body, woodland, and grassland, encouraging sustainable development. Overall, these results provide useful inputs to the LULC planners and water resources managers to elaborate on eco-friendly policies and regulations for GRB.

Detecting land use/land cover changes in the Lake Hayq (Ethiopia) drainage basin, 1957-2007

2015 ◽  
Vol 20 (1) ◽  
pp. 1-18 ◽  
Author(s):  
Hassen M. Yesuf ◽  
Mohammed Assen ◽  
Assefa M. Melesse ◽  
Tena Alamirew
Keyword(s):  
Land Use ◽  
Land Cover ◽  
Drainage Basin ◽  
Land Cover Changes ◽  
Land Use Land Cover

scholarly journals Environmental fragility based on the spatial distribution of soil resistance for the en-vironmental protection area (EPA) of Botucatu, Sao Paulo, Brazil

2019 ◽  
Vol 19 (3) ◽  
pp. 391 ◽  
Author(s):  
Fernando De Alvarenga Yoshida ◽  
Rubismar Stolf
Keyword(s):  
Land Use ◽  
Spatial Distribution ◽  
Sao Paulo ◽  
Natural Resistance ◽  
Soil Resistance ◽  
São Paulo ◽  
Distribution Features ◽  
Environmental Protection Area ◽  
Protection Area ◽  
Algebraic Maps

Effective soil management requires an understanding of the physical, chemical and spatial distribution features of soil. Based on the spatial distribution of soil resistance to mechanical penetration, this study sought to construct an environmental fragility index of this resistance and apply it to an environmental fragility map of the Environmental Protection Area (EPA) of Botucatu, Sao Paulo, Brazil. Methodologies consisting of an empirical analysis of the environment, geostatistics, a multi-criteria decision analysis and algebraic maps were used. Measurements of soil resistance to mechanical penetration, sloping, soil type and land use were integrated into an environmental fragility map. The results showed that 32.5% of the sample area fell into the low fragility categories and 67.57%, into the middling and very high fragility categories. Our conclusion was that soil resistance to mechanical penetration, which is a natural feature found in various types of soils, can therefore be included as one of the criteria in a fragility analysis. We found evidence suggesting that soil resistance to mechanical penetration has a direct relationship with sloping and land use, namely, in cases where different types of use and their management exert change on the soil’s natural resistance to the extent of rendering it fragile.

scholarly journals Land use and land cover changes in São Paulo Macro Metropolis and implications for water resilience under climate change

2021 ◽  
Vol 12 (2) ◽  
pp. 13-50
Author(s):  
Demerval Gonçalves ◽  
Wilson Cabral Sousa Júnior ◽  
Luciana de Resende Londe ◽  
Marcos Pellegrini Coutinho ◽  
Walter Manoel Mendes Filho
Keyword(s):  
Climate Change ◽  
Land Use ◽  
Land Cover ◽  
Water Supply ◽  
Climate Models ◽  
Sao Paulo ◽  
Land Cover Changes ◽  
São Paulo ◽  
Climate Data

The São Paulo Macro Metropolis (MMP) is a geographical arrangement that brings together the most significant Brazilian socioeconomic figures and faces numerous challenges, such as heavy pressure on natural resources. Through compilation, spatialization and cross-referencing of data, this work assessed time series of land use and land cover of the last decades, the water supply status in an urban environment and climate data projection for MMP. Municipalities with different profiles were identified: those with positive final balances and those with negative final balances about the maintenance of their natural areas. Furthermore, more than half of the municipalities of the MMP have low water supply assurance, which can be aggravated due to climate change, as predicted in several climate models. The characterization of municipalities based on this information allowed identifying which of them are the most vulnerable, and these results indicate paths for coordinated actions at local and regional levels to increase water resilience in the macro-region.

scholarly journals Relationship between Fire Events and Land Use Changes in the State of São Paulo, Brazil

2021 ◽  
Vol 13 (15) ◽  
pp. 2853
Author(s):  
Sheena Philogene ◽  
Wenge Ni-Meister
Keyword(s):  
Land Use ◽  
Land Cover ◽  
Land Use Changes ◽  
Sao Paulo ◽  
Google Earth ◽  
The State ◽  
Direct Result ◽  
São Paulo ◽  
Forested Areas ◽  
In Fire

This study investigated the land use and land cover changes in the state of São Paulo, Brazil, for the period of 2002 through 2017, to determine if forested areas were burned or converted to other land uses, to analyze the use of fire as a catalyst and mechanism for land cover change, and to determine if there was a relationship between land use changes and gross domestic product (GDP). MapBiomas classifications and MODIS data were analyzed using the Google Earth Engine. The results of the analysis found that there were minimal changes in the forested areas in São Paulo during the study period; however, there was a 5% increase in natural forest and a 75% increase in planted forest cover. On the other hand, there was a 128% increase in sugarcane, and nearly a 50% decrease in pasture land coverage, suggesting that land was converted from pasture to more profitable agricultural land. Finally, there was a strong positive correlation (r = 0.96) between the increase in sugarcane and the GDP, and a negative correlation between the frequency of fire events and economic production (r = −0.62). Overall, there was a decline in fire events in São Paulo, with fire events occurring in less than 2% of the total observed land area by 2017. This overall declining trend in fire events are likely the direct result of increases in green harvest methods, which prevent the need for pre-harvest burning.

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