Description: Das Projekt "Land Cover Change Assessment in Catchments of the Lower Mekong Basin" wird vom Umweltbundesamt gefördert und von Universität Göttingen, Burckhardt-Institut, Abteilung Waldinventur und Fernerkundung durchgeführt. Since 1950, the riparian countries of the Mekong River have undergone a dynamic change in land-use. Extensive areas of forest have been logged and cleared for agriculture. Hamilton (1987) emphasizes the role of scale in measuring the impacts of land-use practices. They can be classified into three categories based on the affected area: local level, medium level and macro level. Impacts occur at the local scale in the area where land-use takes place, caused e.g. by soil erosion, new fallow zones or areas showing declines in soil fertility and productivity. Impacts at the medium or macro scale are e.g. sedimentation and siltation of riverbeds, reservoirs and irrigation systems, frequency of low flows and floods, deposition of chemical residues in rivers and lakes. These last-mentioned impacts are more difficult and complex to manage. There are only few empirical studies on the relationship between the removal of forest and land-use changes regarding water yield (low flows, floods), soil erosion, sedimentation and nutrient load of streams within the geographical context of the Lower Mekong Basin. Quantitative information is needed to support decisions in watershed management which includes management of all natural resources within a watershed for the protection and production of water resources while maintaining environmental stability. Objectives: In the framework of two master theses a time series of land cover changes from the 1950s to 2000 will be processed and analysed for the Nam Ton Pilot catchment in Laos PDR using remote sensing and GIS. The following materials are available at MRCS: Landsat TM and ETM+ images, SPOT images, aerial photos: 1:20,000 and 1:50,000 scale
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Göttingen ? Ufer ? Gerinne ? Seen ? Fluss ? Werkstoff ? Nährstoffelimination ? Nährstoff ? Resistenz ? Skigebiet ? Verlandung ? Erosion ? Hochwasser ? Überschwemmung ? Abfluss ? Bodenfruchtbarkeit ? Landwirtschaftliche Brache ? Landnutzungsänderung ? Bewässerungssystem ? Bewirtschaftung von Wassereinzugsgebieten ? Waldinventur ? Wasser ? Deposition ? Bewertung ? Einzugsgebiet ? Management ? Chemikalien ? Niedrigwasser ? Messung ? Flächennutzung ? Natürliche Ressourcen ? Bewässerung ? Belastung ? Wirkung ? Geographie ? Rechtsverfahren ? Landbedeckung ? Wasserspeicher ? Zeitreihe ? Produktivität ? Bedarf ? Umwelt ? Wasserscheide ? Wasserressourcen ? Wald ? Gewässer ? Empirische Untersuchung ? Fernerkundung ? Landwirtschaft ? Abdeckung ? Ressource ? Rückstand ? Sedimentation ? Produktion ? BEZUG ? ENTFERNUNG ? ENTSCHEIDUNG ? FOERDERN ? Fluss [Bewegung] ? GEMISCHT ? LAENDER ? LAND ? NEU ? NICHTOEFFENTLICH ? NIEDERFREQUENT ? SCHUTZ ? See [Binnengewässer] ? VERFUEGBAR ? Ablagerung ? EINSATZ ?
Region: Lower Saxony
Bounding box: 9.16667° .. 9.16667° x 52.83333° .. 52.83333°
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 2004-11-01 - 2005-08-31
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