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Tesi sul tema "Arid zone"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 25 luglio 2025

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1

Gibson, Michelle Rene. "Movement ecology of Australian arid-zone birds." Thesis, Durham University, 2018. http://etheses.dur.ac.uk/12778/.

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The movements of nomadic species are poorly understood, being highly dynamic over time and space. There is an urgent need to better understand this group as current conservation approaches appear not to be providing adequate protection. In this thesis, I evaluate a survey method to monitor this dynamic group, assess environmental variables driving their movements over time, and explore how rainfall structures the overall avian community. To date, no standardized, large-scale monitoring has been carried out for arid zone or nomadic species. In Chapter 2, I describe a protocol for surveying this

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2

Gunawardene, Nihara. "Arid zone ant communities of Western Australia." Thesis, Curtin University, 2003. http://hdl.handle.net/20.500.11937/1178.

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This thesis is prepared in three parts; the first part is a study of the ant species of the southern Carnarvon Basin, which was undertaken in order to determine the patterns of ant species distribution in this arid zone area. The distribution patterns were looked at in terms of biogeographical regions and they demonstrated the transitional nature of this particular area. Recommendations to alter the border between the South-west Province and the Eremaean Province were supported. The next chapter of this thesis analysed ant species from long unburnt and burnt areas of three main vegetation type

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3

Gunawardene, Nihara. "Arid zone ant communities of Western Australia." Curtin University of Technology, Department of Environmental Biology, 2003. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=16212.

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This thesis is prepared in three parts; the first part is a study of the ant species of the southern Carnarvon Basin, which was undertaken in order to determine the patterns of ant species distribution in this arid zone area. The distribution patterns were looked at in terms of biogeographical regions and they demonstrated the transitional nature of this particular area. Recommendations to alter the border between the South-west Province and the Eremaean Province were supported. The next chapter of this thesis analysed ant species from long unburnt and burnt areas of three main vegetation type

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4

McGee, P. A. "Role of mycorrhizas in the regeneration of arid zone plants /." Title page, contents and summary only, 1987. http://web4.library.adelaide.edu.au/theses/09PH/09phm1448.pdf.

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5

Saccò, Mattia. "Functional ecology of calcrete aquifers in arid zone Western Australia." Thesis, Curtin University, 2020. http://hdl.handle.net/20.500.11937/80356.

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This study investigates the ecology of an arid zone calcrete through an interdisciplinary design composed of multivariate analyses, hydrology, isotopic ecology and genetics. Our results indicate that the biotic community (microbes and stygofauna) is closely linked to the hydrodynamic conditions influenced by different rainfall regimes. The inflow of rainfall triggered shifts towards more deterministic dynamics, revealing a complex web of interactions. This investigation provides crucial untangling of the ecological dynamics regulating biotic communities in groundwaters.

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6

Pistorius, Penny. "How air temperature affects flight initiation distance in arid-zone birds." Master's thesis, University of Cape Town, 2016. http://hdl.handle.net/11427/20993.

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Arid zones, such as the Kalahari in southern Africa, are experiencing an increase in the number of hot days, as well as in the intensity of heat waves. Research is being conducted to try and understand how increasing temperatures will impact bird communities and population persistence in these areas. Understanding the mechanisms through which birds are vulnerable to climate change is key to answering these questions. This study investigated how changes in air temperature affect arid-zone birds' response to predators. The flight initiation distances (FID), i.e. the distance from a predator when

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7

McGrath, Kate. "Long-term vegetation change in response to rest from grazing at Worcester Veld Reserve." Bachelor's thesis, University of Cape Town, 2002. http://hdl.handle.net/11427/25919.

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8

Hartley, Mary Luisa. "Breeding system and genetic variation in Tylosema esculentum." Thesis, University of Sussex, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.361301.

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9

Ffolliott, Peter F. "Arid Zone Forestry Program: State of Knowledge and Experience in North America." College of Agriculture, University of Arizona (Tucson, AZ), 1989. http://hdl.handle.net/10150/310780.

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10

Joshi, Bhaskar. "Estimation of diffuse vadose zone soil-water flux in a semi-arid region." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq23996.pdf.

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11

Ramadan, Mohamad Fahmy A. "Interactive urban form design of local climate scale in hot semi-arid zone." Thesis, University of Sheffield, 2011. http://etheses.whiterose.ac.uk/15120/.

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12

Jardine, Angela Beth. "Aqueous Phase Tracers of Chemical Weathering in a Semi-arid Mountain Critical Zone." Thesis, The University of Arizona, 2011. http://hdl.handle.net/10150/144594.

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Chemical weathering reactions are important for the physical, chemical, and biological development of the critical zone. We present findings from aqueous phase chemical analyses of surface and soil pore waters during a 15 month study in a small semi-arid mountain catchment of the Santa Catalina Mountain Critical Zone Observatory. Stream water geochemical solutes are sourced to two distinct locations - fractured bedrock baseflow stores and soil quickflow stores. Solid phase observations of albite, anorthite, and K-feldspar transformation to Ca-montmorillonite and kaolinite are supported by stre

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13

McClurg, Lorne W. H. "Validation of a methodology for observing biomass dynamics in photographs of arid zone vegetation /." Title page, contents and abstract only, 1993. http://web4.library.adelaide.edu.au/theses/09AR/09arm1264.pdf.

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14

El-Hames, A. S. "A physically-based model for the prediction of flood hydrographs in arid zone catchments." Thesis, University of Cambridge, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.306990.

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15

Lloyd, Penn. "A study of the ecology of the Namaqua Sandgrouse and other arid-zone birds." Doctoral thesis, University of Cape Town, 1998. http://hdl.handle.net/11427/9680.

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Bibliography: leaves [148]-164.<br>This field study set out to identify the key ecological factors influencing the population dynamics of the Namaqua Sandgrouse Pterocles namaqua, through an investigation of diet and the nutritional demands during different stages of the annual cycle, the timing of breeding seasons and movements in relation to patterns of rainfall-dependent food availability, breeding success and the factors limiting productivity. In addition, the nesting habits and success of 11 coexisting arid-zone bird species were examined to test a variety of hypotheses regarding the rela

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16

Sun, Bo. "Spatio-temporal modelling of landuse and land cover change in arid zone, northwest China." HKBU Institutional Repository, 2010. https://repository.hkbu.edu.hk/etd_ra/1163.

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17

Qian, Jing. "Analyzing and modelling the spatio-temporal pattern of urban expansion in China's arid zone." HKBU Institutional Repository, 2012. https://repository.hkbu.edu.hk/etd_ra/1396.

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18

Piers, Laetitia. "Implications of potential biome boundary shifts for small mammal assemblages in the arid zone." University of the Western Cape, 2019. http://hdl.handle.net/11394/7051.

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Magister Scientiae (Biodiversity and Conservation Biology)<br>Desertification deteriorates the landscape functionality of rangelands, affecting the resilience of biome boundaries which have a cascade effect not only in vegetation composition and characteristics but also in animal communities. The balance between plants and small mammals are essential in maintaining the functionality (i.e. nutrient cycling, soil stability, and water infiltration) of rangeland which includes the arid Steinkopf communal rangeland. However, the landscape functionality of rangelands has not been extensively st

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19

Al-Hasem, Ahmed M. "Coastal morphodynamics of an open-ended tidal channel in an arid and mesotidal environment : Al-Subiya Tidal Channel, Kuwait /." St. Lucia, Qld, 2001. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16464.pdf.

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20

Lictevout, Elisabeth. "Accès à l'eau souterraine des populations vulnérables en zone aride : un problème de ressource, de gestion ou d'information ?" Thesis, Montpellier, 2018. http://www.theses.fr/2018MONTG059/document.

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Les zones arides abritent 35% de la population mondiale et affichent parmi les plus hauts niveaux de pauvreté. La faible quantité et l’hétérogénéité spatio-temporelle des précipitations et des écoulements compliquent non seulement l’exploitation de la ressource mais aussi la compréhension de ces hydro-systèmes. Cependant, depuis les origines de l’histoire humaine, les populations ont su domestiquer l’eau des zones arides, tant superficielle, que souterraine. Mais les dernières décennies ont vu certaines zones arides devenir le théâtre du développement d’activités industrielles aux usages d’eau

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21

Easton, Lyndlee Carol, and lyndlee easton@flinders edu au. "LIFE HISTORY STRATEGIES OF AUSTRALIAN SPECIES OF THE HALOPHYTE AND ARID ZONE GENUS FRANKENIA L. (FRANKENIACEAE)." Flinders University. Biological Sciences, 2008. http://catalogue.flinders.edu.au./local/adt/public/adt-SFU20081124.105244.

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This thesis is a comparative study of the life history strategies, and in particular seed germination requirements, in Australian species of the halophyte plant genus Frankenia L. (Frankeniaceae). Frankenia is a cosmopolitan genus that occurs in Mediterranean, semi-arid, and arid regions on distinctive soil types commonly on saline, sodic or gypseous soils in habitats such as coastal cliffs, and on the margins of salt lakes, salt-pans and saltmarshes (Summerhayes 1930; Barnsley 1982). The plants are small shrubs or cushion-bushes with pink, white or pale purple flowers, and salt-encrusted

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22

Harrington, Rhidian. "The effects of artificial watering points on the distribution and abundance of avifauna in an arid and semi-arid mallee environment." Connect to this title online, 2002. http://repository.unimelb.edu.au/10187/2874.

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The role of artificial watering points in the avifaunal dynamics of the semi-arid mallee woodlands of southeast Australia was examined. Species richness and abundance were monitored throughout the year at different distances from water to determine how birds were distributed around water points and how this changed in relation to environmental factors such as climate. Vegetation attributes were also measured to determine which factors explained patterns in the avifauna with distance from water, and also to allow a description of the vegetation in relation to the water points. Water points were

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23

Rasheeduddin, Mohammed. "A groundwater resources development study of a regional arid zone multi-aquifer system : Eastern Province, Saudi Arabia." Thesis, University of Birmingham, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.272620.

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24

Pirie, Anne. "Chipped stone variability and approaches to cultural classification in the Epipalaeolithic of the south Levantine arid zone." Thesis, Durham University, 2001. http://etheses.dur.ac.uk/3777/.

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This thesis examines how our picture of the Epipalaeolithic of the southern Levant has been structured, what its evidential base is and how it has gained authority. Hitherto, research has focused on describing variability in microliths, the type-fossil of the period, in terms of archaeological cultures using typology. Narrative analysis was used in the first part of this thesis to explore the work of three main researchers in the field. This has shown that narrative strategies are indeed employed in archaeological texts to describe lithic and other data creating a picture of the period that re

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25

Pert, Petina Lesley, and petina pert@bigpond com. "Biodiversity Conservation at the Bioregional Level: a case study from the Burt Plain Bioregion of Central Australia." RMIT University. Mathematical and Geospatial Sciences, 2006. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20070209.120654.

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This thesis considers ways to improve biodiversity conservation at the bioregional level in Australia through the use of geospatial science technologies and biological modelling techniques. Following a review of approaches to biodiversity conservation at the bioregional level, including the roles and potential of geospatial science technologies in this regard, I consider biodiversity modelling using a case study of the Burt Plain bioregion in central Australia that focuses on selected taxa, ecosystems and landscapes. The Burt Plain bioregion was chosen since it is one of 19 biore

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26

Bates, Gemma S. "Sedimentology and arid-zone diagenesis of unconformity-related carboniferous and triassic strata, Saskatchewan, Canada and Bristol Channel, U.K." Thesis, University of East Anglia, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.492971.

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27

Mulengera, Matthew Kagorobha. "Soil loss prediction in the semi-arid tropical savanna zone : a tool for soil conservation planning in Tanzania." Thesis, University of Newcastle Upon Tyne, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318175.

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28

Greenville, Aaron C. "The role of ecological interactions: how intrinsic and extrinsic factors shape the spatio-temporal dynamics of populations." Thesis, The University of Sydney, 2015. http://hdl.handle.net/2123/13561.

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How individuals respond to environmental demands and pressures from conspecifics and from other species determines whether they will survive and reproduce, and hence whether their populations will persist. However, not all environments are benign or predictable, and not all populations of the same species respond to environmental pressures in the same way. The overall objective of this thesis was to incorporate both biotic and abiotic interactions into one conceptual framework to better understand and predict how species’ populations change across space and time. To help progress this objectiv

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29

Commander, Lucy. "Seed biology and rehabilitation in the arid zone : a study in the Shark Bay world heritage area, Western Australia." University of Western Australia. School of Plant Biology, 2009. http://theses.library.uwa.edu.au/adt-WU2009.0091.

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Research into seed biology and restoration ecology of areas disturbed by mining is crucial to their revegetation. Shark Bay Salt, a solar salt facility in the Shark Bay World Heritage Area in Western Australia has several areas of disturbance as a result of 'soil borrowing'. Soil from these areas termed 'borrow pits' was used to create infrastructure such as the roads and embankments surrounding the evaporation ponds. Many of the pits contain little to no vegetation after >10 years since disturbance ceased, hence research into their restoration is now essential. A vegetation survey at the site

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30

Zapata-Rios, Xavier, Paul D. Brooks, Peter A. Troch, Jennifer McIntosh, and Craig Rasmussen. "Influence of climate variability on water partitioning and effective energy and mass transfer in a semi-arid critical zone." COPERNICUS GESELLSCHAFT MBH, 2016. http://hdl.handle.net/10150/617370.

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The critical zone (CZ) is the heterogeneous, near-surface layer of the planet that regulates life-sustaining resources. Previous research has demonstrated that a quantification of the influxes of effective energy and mass transfer (EEMT) to the CZ can predict its structure and function. In this study, we quantify how climate variability in the last 3 decades (1984–2012) has affected water availability and the temporal trends in EEMT. This study takes place in the 1200 km<sup>2</sup> upper Jemez River basin in northern New Mexico. The analysis of climate, water availability, and EEMT was based

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31

Bouragba, Latifa. "Etude de la recharge artificielle des nappes en zone semi-aride : application au bassin du Souss-Maroc." Thesis, Besançon, 2011. http://www.theses.fr/2011BESA2046.

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La plaine du Souss est délimitée au nord par le Haut-Atlas, au sud par l’Anti-Atlas et à l’estpar le massif cristallin de Siroua. Les principales formations géologiques sont des marnocalcaireset conglomérats assez perméables, les calcaires du Turonien qui leur sont sousjacentset le lit fossile de l’oued Souss composé d’alluvions sablo-graveleuses trèsperméables.La nappe du Souss est la plus importante du sud du Maroc, elle est très exploitée par unsecteur agricole exportateur, la surexploitation de la nappe s’est traduite par une baissecontinue des niveaux. Depuis 1970, les prélèvements dépass

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32

Kingston, Mark B. "Riparian and Upslope Influences on the Regional Avifauna of the Semi-Arid Mulga Lands of South West Queensland." Thesis, Griffith University, 2005. http://hdl.handle.net/10072/367637.

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Riparian areas have been widely recognised by wildlife biologists as a critically important and functionally dominant component of terrestrial landscapes. This viewpoint has its genesis in high concentrations of species and individuals across a wide range of environments and strong interactions between riparian areas and the surrounding landscape. Despite major concerns regarding conservation management in the Australian arid zone, few studies have specifically examined the importance of riparian areas to the terrestrial bird fauna of arid and semi-arid Australia. This research aimed to examin

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33

Chebbi, Wafa. "Caractérisation des échanges d'eau et d'énergie dans une oliveraie pluviale en zone aride : modélisation et intégration des données de télédétection." Thesis, Toulouse 3, 2019. http://www.theses.fr/2019TOU30111.

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L'olivier est un agrosystème pérenne clé pour l'économie du pourtour méditerranéen avec des pratiques culturales contrastées (sec épars/irrigué intensive, co-planté...). Connu pour ses mécanismes d'adaptations au stress hydrique et sa capacité de survivre durant de longues périodes à conditions limitantes en eau de sol, l'oléiculture pluviale est dominante dans cette zone, notamment en Tunisie et l'écartement entre les arbres est une fonction de la distribution de la pluviométrie (un nombre important de pieds à l'hectare au Nord (6 m) et des oliveraies très éparses au Sud (25 m)) assurant un v

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34

Daamen, Carl Christopher. "Evaporation from sandy soils beneath crops in the semi-arid zone : a study of the use of microlysimeters and numerical simulation." Thesis, University of Reading, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.357138.

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35

Abdillahi, Boeuh Ahmed. "La gestion durable de l'eau en zone aride : le cas de la ville de Djibouti." Thesis, Bordeaux, 2016. http://www.theses.fr/2016BORD0104.

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La question de l’accès à l’eau potable se pose avec acuité pour les pays de la régionsubsaharienne où un individu sur trois n’a pas accès à une source d’eau améliorée.L’objectif de cette thèse vise à définir les conditions d’une gestion durable de l'eau pourla ville de Djibouti. Dans ce contexte, la question de l'approvisionnement en eau estenvisagée dans une perspective patrimoniale afin de tenir compte des particularités dela ressource en zone aride et des usages spécifiques qui lui sont associés dans unenvironnement marqué par la pauvreté. Un apport majeur de la thèse réside d'une partdans

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36

Cohen, Callan. "The phylogenetics, taxonomy and biogeography of African arid zone terrestrial birds : the bustards (Otididae), sandgrouse (Pteroclidae), coursers (Glareolidae) and Stone Partridge (Ptilopachus)." Doctoral thesis, University of Cape Town, 2011. http://hdl.handle.net/11427/10316.

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The phylogenetics and biogeography of the following four groups of unrelated terrestrial non-passerine birds, that have endemics in both the south-west and north-east arid-zone lowlands (and Sahel), and which also encompass taxa with differing habitat tolerances, mobility and life-history traits, were examined: the bustards (Otididae), sandgrouse (Pteroclidae), coursers (Glareolidae) and Stone Partridge (Ptilopachus). Another aim of this research is to use insights from the evolutionary relationships of these families to assess the current state of their taxonomy, as well as to assess characte

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37

Montague-Drake, Rebecca School of Biological Earth &amp Environmental Sciences UNSW. "Strategic management of artificial watering points for biodiversity conservation." Awarded by:University of New South Wales. School of Biological, Earth and Environmental Sciences, 2004. http://handle.unsw.edu.au/1959.4/30122.

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Since pastoralism began in Australia???s rangelands, the number of artificial watering points (AWPs) has increased dramatically, such that today, few areas of rangeland are further than 10 km from water. This increased availability of water has caused many ecological impacts. Unfortunately, such impacts are poorly understood in the context of an Australian conservation reserve, thus hindering strategic management. This study examined the spatial distribution of vertebrate (kangaroos, small mammals, lizards and avifauna) and vegetative variables around open AWPs as well as AWPs that have been c

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38

Puech, Christian. "Détermination des états de surface par télédétection pour caractériser les écoulements des petits bassins versants : application à des bassins en zone méditerranéenne et en zone tropicale sèche." Grenoble 1, 1993. http://www.theses.fr/1993GRE10175.

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La liaison entre la teledetection des etats de surface et l'hydrologie est etudiee sur deux sites, revelant l'importance des problemes d'echelle et la necessite d'informations hydrologiques de type versant. Sur les bassins du real collobrier (var, france) apres des corrections imposees par le fort relief, le traitement de l'imagerie satellitaire conduit a une cartographie des essences forestieres. La part d'ecoulement relative a chaque zone homogene est calculee a des pas de temps annuel, trimestriel, mensuel et sur des episodes. Une liaison coherente entre zones et types d'ecoulement est obte

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39

Dittmer, Drew E., та Joseph R. Bidwell. "Herpetofaunal Species Presence in Buffel Grass (Cenchrus ciliaris ) versus Native Vegetation‐Dominated Habitats at Uluṟu‐Kata Tjuṯa National Park". Digital Commons @ East Tennessee State University, 2018. https://doi.org/10.1111/aec.12557.

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Buffel grass (Cenchrus ciliaris ) has been established in Uluṟu‐Kata Tjuta National Park since 1968. To date, the influence of buffel grass on the Park's flora and fauna has been largely unassessed. The objectives of this study were to determine if buffel grass dominates vegetation communities at the base of Uluṟu and if buffel grass habitats are associated with lower reptile and amphibian species richness than endemic vegetation communities. We used vegetation transects to measure the amount of buffel grass and genera of endemic vegetation at 26 sampling locations around the base of Uluṟu. Th

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40

Pfletschinger, Heike [Verfasser], Christoph [Akademischer Betreuer] Schüth, and Matthias [Akademischer Betreuer] Hinderer. "Development of Laboratory Experiments and Numerical Modeling Techniques to Quantify Vadose Zone Water Fluxes in Arid Regions / Heike Pfletschinger. Betreuer: Christoph Schüth ; Matthias Hinderer." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2012. http://d-nb.info/1107041260/34.

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Funghi, Caterina [Verfasser], and Griffith Simon [Akademischer Betreuer]. "The integration of spatial-ecology and animal behaviour in the unpredictable arid zone : A case study with the zebra finch / Caterina Funghi ; Betreuer: Griffith Simon." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2019. http://d-nb.info/1194548016/34.

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42

Gilliland, Krista. "Irrigation and persistence in the dry zone of Sri Lanka : a geoarchaeological study." Thesis, University of Stirling, 2011. http://hdl.handle.net/1893/3681.

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This thesis presents an independent, sediment-based record of landscape change within an agricultural hinterland. Established historical and archaeological sequences document the primary occupation of Anuradhapura, Sri Lanka’s ancient capital, beginning ca. 400 BC and lasting until it was largely abandoned in AD 1017. Anuradhapura is located in the island’s dry zone, which depends almost completely on the unpredictable Northeastern Monsoon for water. Oral history and historical narratives have long held that large-scale irrigated rice cultivation took place in the hinterland to produce an agri

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43

Murray, Francis J. "Potential for aquaculture in community-managed irrigation systems of the dry-zone, Sri Lanka : impacts on livelihoods of the poor." Thesis, University of Stirling, 2004. http://hdl.handle.net/1893/62.

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Rainfed areas in the Dry-Zone of Sri Lanka are characteristic of extensive marginal agro-ecosystems known as the semi-arid tropics (SAT) populated by poor farming communities. In the Dry-Zone and elsewhere, the traditional response to seasonal water scarcity was to construct rainfall-harvesting devices known as ‘tanks’; created by building earthen dykes across ephemeral streams in undulating terrain. Most are held in common ownership by adjacent communities, who use them for multiple functions including irrigation, bathing and fishing. Storage efficiency is enhanced by arranging tanks in casca

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Hess, Tim M. "The impact of climatic variability over the period 1961- 1990 on the soil water balance of upland soils in the North East Arid Zone of Nigeria." Thesis, Cranfield University, 1991. http://hdl.handle.net/1826/2723.

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Over the period 1961 – 90 the North East Arid Zone of Nigeria experienced a decline in annual rainfall totals and increased aridity which placed increasing pressure on rain fed, millet-based farming systems. The changes in seasonal rainfall total and distribution have been examined and it has been shown that the rate of decline has been consistent across the region. The decline has been dominated by reduction in the number of rain days during the middle of the rainy season and there is no evidence of a significant change in the length of the growing season. Over the same time period, there has

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45

Costa, Carlos Alexandre Gomes. "Soil moisture and water availability in the root zone under natural conditions of preserved Caatinga." Universidade Federal do CearÃ, 2012. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=8261.

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Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico<br>A Ãgua na bacia hidrogrÃfica estÃ distribuÃda em diversos compartimentos importantes no que se refere Ã ecohidrologia. Muitos estudos em regiÃes semiÃridas apontam os reservatÃrios superficiais como principais compartimentos de Ãgua. Entretanto, a bacia hidrogrÃfica tem maior abrangÃncia que as bacias hidrÃulicas nela contida, e os recursos hÃdricos nos compartimentos distribuÃdos na bacia hidrogrÃfica (como no solo) devem ser analisados nÃo somente no que se refere aos usos ecolÃgicos, mas tambÃm como espaÃo de disponibilidade h

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46

Diallo, Mamadou. "Problemes economiques de la maitrise de l'eau dans le sahel : le cas des petits perimetres irrigues avec l'eau souterraine." Paris, ENMP, 1988. http://www.theses.fr/1988ENMP0123.

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Cette etude cherche a determiner sous quelles conditions economiques l'eau souterraine peut etre utilisee a des fins agricoles dans le sahel. Auparavant on a cherche a definir la place de l'eau dans la crise de l'agriculture. Puis on a examine le role que l'eau souterraine peut jouer dans la resolution de cette crise

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47

Ibrahim, Ali Hano Abdelnasir. "Assessment of Impacts of Changes in Land Use Patterns on Land Degradation/Desertification in the Semi- arid Zone of White Nile State, Sudan, by Means of Remote Sensing and GIS." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-157627.

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In Sudan, land degradation/desertification (LDD) has devastated large areas and consequently, it includes social, economic, and environmental aspects. LDD results from various factors, including climatic variation and human activities. Probably the LU practices and their changes have contributed to an increase of LDD in that area. Remote sensing technology has become unique and developed tool for providing temporal and spatial information for the LDD research and other environmental aspects. Determination of LDD and its relationship to land use pattern change (LUC) at spatiotemporal scale is r

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48

Rusagara, Radegonde. "Développement d'un modèle conceptuel de recharge des aquifères de socle cristallin dans la zone sahélienne du Burkina Faso en Afrique de l'Ouest." Electronic Thesis or Diss., Sorbonne université, 2022. http://www.theses.fr/2022SORUS319.

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Les données de la recharge des aquifères de socle au Sahel en Afrique de l'Ouest sont limitées en raison d'une connaissance insuffisante sur les mécanismes de recharge. Cette étude a été initiée dans le bassin versant à la rivière éphémère de Tougou (37 km2) pour améliorer la compréhension des mécanismes de recharge d'un aquifère de socle dans la zone sahélienne du Burkina Faso. Elle est basée sur des investigations menées de 2016 à 2020 sur un transect piézométrique et des puits de grand diamètre, respectivement perpendiculaires et longitudinaux à la rivière. L'analyse du profil de tomographi

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49

Ibrahim, Ali Hano Abdelnasir [Verfasser], Elmar [Akademischer Betreuer] Csaplovics, Mubark [Akademischer Betreuer] Abdelrahman, and Hannelore [Akademischer Betreuer] Kusserow. "Assessment of Impacts of Changes in Land Use Patterns on Land Degradation/Desertification in the Semi- arid Zone of White Nile State, Sudan, by Means of Remote Sensing and GIS / Abdelnasir Ibrahim Ali Hano. Gutachter: Elmar Csaplovics ; Mubark Abdelrahman ; Hannelore Kusserow." Dresden : Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://d-nb.info/1069092118/34.

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50

Santos, Clêane Oliveira dos. "(Re)configurações territoriais da produção orgânica do Agreste Central de Sergipe à luz das potencialidades ambientais." Universidade Federal de Sergipe, 2016. https://ri.ufs.br/handle/riufs/5446.

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This research aims to analyze the environmental potentialities present in the effectiveness of area of organic agriculture in Sergipe Central Arid zone. It appears that the spreading of organic agriculture in Sergipe is taking place thanks to the construction of new social and environmental coexistence level values associated with the changes in management practices. The area of this analysis are the municipalities of Areia Branca, Itabaiana and Malhador, which are part of the territory of Central Sergipe Arid zone. To develop this research the study methodology was structured in three stages:

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