scholarly journals Forest recovery since 1860 in a Mediterranean region: drivers and implications for land use and land cover spatial distribution

2017 ◽  
Vol 33 (2) ◽  
pp. 289-305 ◽  
Author(s):  
Juliet Abadie ◽  
Jean-Luc Dupouey ◽  
Catherine Avon ◽  
Xavier Rochel ◽  
Thierry Tatoni ◽  
...  
Keyword(s):  
Land Use ◽  
Spatial Distribution ◽  
Land Cover ◽  
Mediterranean Region ◽  
Forest Recovery

scholarly journals Water-Sediment Physicochemical Dynamics in a Large Reservoir in the Mediterranean Region under Multiple Stressors

Water ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 707
Author(s):  
Patrícia Palma ◽  
Alexandra Marchã Penha ◽  
Maria Helena Novais ◽  
Sofia Fialho ◽  
Ana Lima ◽  
...  
Keyword(s):  
Land Use ◽  
Land Cover ◽  
Mediterranean Region ◽  
Multiple Stressors ◽  
Meteorological Conditions ◽  
Severe Drought ◽  
Potentially Toxic Metals ◽  
Large Reservoir ◽  
Increased Risk ◽  
The Mediterranean

Nowadays, the Mediterranean freshwater systems face the threat of water scarcity, along with multiple other stressors (e.g., organic and inorganic contamination, geomorphological alterations, invasive species), leading to the impairment of their ecosystem services. All these stressors have been speeding up, due to climate variability and land cover/ land use changes, turning them into a big challenge for the water management plans. The present study analyses the physicochemical and phytoplankton biomass (chlorophyll-a) dynamics of a large reservoir, in the Mediterranean region (Alqueva reservoir, Southern Portugal), under diverse meteorological conditions and land cover/land use real scenarios (2017 and 2018). The most important stressors were identified and the necessary tools and information for a more effective management plan were provided. Changes in these parameters were further related to the observed variations in the meteorological conditions and in the land cover/land use. The increase in nutrients and ions in the water column, and of potentially toxic metals in the sediment, were more obvious in periods of severe drought. Further, the enhancement of nutrients concentrations, potentially caused by the intensification of agricultural activities, may indicate an increased risk of water eutrophication. The results highlight that a holistic approach is essential for a better water resources management strategy.

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 Assessing the Effects of Land Cover Land Use Change on Precipitation Dynamics in Guangdong–Hong Kong–Macao Greater Bay Area from 2001 to 2019

2021 ◽  
Vol 13 (6) ◽  
pp. 1135
Author(s):  
Xinghan Wang ◽  
Peitong Cong ◽  
Yuhao Jin ◽  
Xichun Jia ◽  
Junshu Wang ◽  
...  
Keyword(s):  
Land Use ◽  
Spatial Distribution ◽  
Hong Kong ◽  
Land Use Change ◽  
Land Cover ◽  
Temporal Distribution ◽  
Water Security ◽  
Spatial And Temporal Distribution ◽  
Construction Land ◽  
Bay Area

The change of spatial and temporal distribution of precipitation has an important impact on urban water security. The effect of land cover land use change (LCLUC) on the spatial and temporal distribution of precipitation needs to be further studied. In this study, transfer matrix, standard deviation ellipse and spatial autocorrelation analysis techniques were used. Based on the data of land cover land use and precipitation, this paper analyzed the land cover land use change and its influence on the spatial and temporal distribution pattern of precipitation in the Guangdong–Hong Kong–Macao Greater Bay Area (GBA). The results showed that from 2001 to 2019, the area of cropland, water, barren, forest/grassland in the GBA decreased by 44.03%, 8.05%, 50.22%, 0.43%, respectively, and the area of construction land increased by 20.05%. The precipitation in the GBA was mainly concentrated in spring and summer, and the precipitation in spring tended to increase gradually, while the precipitation in summer tended to decrease gradually, while the precipitation in autumn and winter has no obvious change. It was found that with the change of land cover land use, the spatial distribution of precipitation also changed. Especially in the areas where the change of construction land was concentrated, the spatial distribution of precipitation changed most obviously.

scholarly journals CHANGES IN PARAMETERIZATIONS OF REGIONAL CLIMATE MODEL REGCM4.4.5: THE ROLE OF LAND COVER ON REGIONAL CLIMATE OVER MEDITERRANEAN

2017 ◽  
Vol 50 (2) ◽  
pp. 1062
Author(s):  
K. Velikou ◽  
K. Tolika ◽  
Ch. Anagnostopoulou
Keyword(s):  
Land Use ◽  
Land Cover ◽  
Regional Climate Model ◽  
Mediterranean Region ◽  
Climate Model ◽  
Heat Waves ◽  
Regional Climate ◽  
Land Use Changes ◽  
Mediterranean Forests ◽  
The Mediterranean

A parameter that affects significantly the local, regional and global climate system is land cover and the changes that may occur to it. During winter season, heavy precipitation assists vegetation growth of Mediterranean forests and woodlands, whereas during summer, absence of precipitation and severe heat waves result to arid and semiarid vegetation. For that reason, it was quite interesting to track the changes that may occur in the climate of the Mediterranean region due to land cover/land use changes on regional climate over the Mediterranean region. The main objective of the study is the assessment of the impacts of land cover/land use changes on regional climate over the Mediterranean region. The examined regional climate model used in the study is RegCM4.4.5. Its spatial resolution is 25x25km and different simulations were performed with changes in land cover/land use for the time period 1981-1990. The different simulated data were compared in order to examine the modifications that occur from land cover/land use changes in evapotranspiration and surface albedo to direct and diffuse radiation in the domain of study.

scholarly journals Granica państwa a spójność danych dla potrzeb analiz hydrologicznych. Studium przypadku dla zlewni Wiaru na pograniczu polsko-ukraińskim = A state border and the integrity of data for hydrological analysis. A case study of the River Wiar catchment on the Poland-Ukraine borderland

2020 ◽  
Vol 92 (1) ◽  
pp. 69-92
Author(s):  
Rafał Kroczak ◽  
Tomasz Bryndal ◽  
Szymon Biały ◽  
Olga Pylypovych ◽  
Yurij Andreychuk ◽  
...  
Keyword(s):  
Land Use ◽  
Spatial Distribution ◽  
Land Cover ◽  
Large Scale ◽  
Satellite Images ◽  
Chemical Components ◽  
Data Sets ◽  
Eu Directive ◽  
Land Cover Data

Hydrological investigations require the development of a geodatabase allowing for the calculation of physiographic catchment parameters, as well as the analysis of amounts of water resources and changes therein. Such a geodatabase usually consists of meteorological, hydrological and cartographic data. The present study offers a review of datasets that may be used for geodatabase development in the interests of hydrological research, in catchments located in the Polish-Ukrainian borderland. The catchment of the Wiar River – selected to serve as a case study – is in fact divided by the state border into two equal sub-catchments (395.5 km2 in Poland and 398.9 km2 in Ukraine).The results reveal disparities in the spatial distribution of stream and meteorological gauges. For the Polish part of the catchment datasets include many parameters (in accordance with EU Directive and Regulations) and the results from monitoring are available online as yearly reports. For the Ukrainian part, only chemical components are monitored, and these data are not made available publicly. Consistent data sets such as DEM can be obtained from globally available ASTER and SRTM models. Datasets, such as LiDAR, which are important for medium and large-scale analyses allowing for the development of high-resolution DEMs, do not exist. Use of TanDEM-X data is restricted for the Ukrainian territory. However, comparison between the SRTM and LiDAR models (for the Polish part) revealed that the SRTM model may be optimised to serve the whole area. Land-use and land-cover data (LULC) are important in many hydrological analyses. the authors propose using satellite images in the development of a comparable layer describing land cover of the whole catchment.

Environmental Monitoring of Land-Use and Land-Cover Changes in a Mediterranean Region of Turkey

2006 ◽  
Vol 114 (1-3) ◽  
pp. 157-168 ◽  
Author(s):  
S. Kilic ◽  
F. Evrendilek ◽  
S. Berberoglu ◽  
A. C. Demirkesen
Keyword(s):  
Land Use ◽  
Land Cover ◽  
Environmental Monitoring ◽  
Mediterranean Region ◽  
Land Cover Changes

scholarly journals Land use/land cover assessment as related to soil and irrigation water salinity over an oasis in arid environment

2020 ◽  
Vol 12 (1) ◽  
pp. 220-231 ◽  
Author(s):  
Khalid G. Biro Turk ◽  
Abdullah S. Aljughaiman
Keyword(s):  
Land Use ◽  
Spatial Distribution ◽  
Land Cover ◽  
Irrigation Water ◽  
Date Palm ◽  
Soil Depth ◽  
Water Salinity ◽  
Lulc Changes ◽  
Irrigation Water Salinity ◽  
Bare Land

AbstractThe land use and land cover (LULC) changes and the implications of soil and irrigation water salinity have adverse effects on crop production and the ecosystems of arid and semiarid regions. In this study, an attempt has been made to analyze and monitor the LULC changes using multitemporal Landsat data for years 1986, 1998, 2007, and 2016 in Al-Ahsa Oasis, Saudi Arabia. In addition, efforts were made to measure the spatial distribution of soil and irrigation water salinity along the oasis. The supervised maximum likelihood classification method was applied to classify the individual images independently. Moreover, soil samples were collected at surface soil depth from the selected LULC types, namely, date palm, croplands, and bare land. Also, groundwater samples were collected from bore wells located in agricultural farms. The spatial distribution of the soil salinity (Ece) and irrigation water salinity (ECiw) was classified based on the Food and Agriculture Organization guidelines. The results showed that significant changes in LULC patterns have occurred during 1986–2016 in the study area. The ECe was found higher in date palm compared with cropland and bare land. However, the spatial distribution of the ECiw over the oasis indicated that 94% of irrigation water ranged between moderate and severe salinity risk. The study concludes that salinity management practices need to be developed in the study area aiming to sustain crop yields, improve soil properties, and minimize the environmental impacts of LULC changes on the ecosystem of Al-Ahsa Oasis.

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