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Using satellite imagery for water balances and environmental impact assessment

Hack, Jochen (2016):
Using satellite imagery for water balances and environmental impact assessment.
León, Managua, In: Congreso Internacional de Ciencia, Tecnología y Educación para el Desarrollo Sostenible, Universidad Tecnológica La Salle León, Managua, 19.-21.10.2016, [Conference or Workshop Item]

Abstract

Satellite imagery data is increasingly available free of charge, in improved spatial and temporal resolution. For the realization of environmental impact assessments and water balances it is becoming a valuable resource, especially when studying large or remote areas in absence of ground data. In this contribution multispectral and radar satellite images are used to study the changes in surface area and water table of Lake Cocibolca (Lake of Nicaragua) during the last decades and the environmental impact of the construction of an interoceanic canal through the Nicaraguan isthmus. Based on surface areas of the lake derived from multispectral Landsat satellite images and lake water levels gained from radar altimetry data, a characteristic volume-water level curve was constructed. This curve may serve as a planning instrument for future use of the lake’s water. Furthermore, the land use affected by the planned interoceanic canal is assessed applying an unobserved and expert-advised classification using Landsat satellite images. Thereby, the affected population, road network, agricultural and natural areas are identified and quantified. Finally, a comprehensive water balance for the river basins along the canal route based on multispectral and radar satellite images is presented. As a result, natural water availability and the amount of water required for canal operation is compared.

Item Type: Conference or Workshop Item
Erschienen: 2016
Creators: Hack, Jochen
Title: Using satellite imagery for water balances and environmental impact assessment
Language: English
Abstract:

Satellite imagery data is increasingly available free of charge, in improved spatial and temporal resolution. For the realization of environmental impact assessments and water balances it is becoming a valuable resource, especially when studying large or remote areas in absence of ground data. In this contribution multispectral and radar satellite images are used to study the changes in surface area and water table of Lake Cocibolca (Lake of Nicaragua) during the last decades and the environmental impact of the construction of an interoceanic canal through the Nicaraguan isthmus. Based on surface areas of the lake derived from multispectral Landsat satellite images and lake water levels gained from radar altimetry data, a characteristic volume-water level curve was constructed. This curve may serve as a planning instrument for future use of the lake’s water. Furthermore, the land use affected by the planned interoceanic canal is assessed applying an unobserved and expert-advised classification using Landsat satellite images. Thereby, the affected population, road network, agricultural and natural areas are identified and quantified. Finally, a comprehensive water balance for the river basins along the canal route based on multispectral and radar satellite images is presented. As a result, natural water availability and the amount of water required for canal operation is compared.

Place of Publication: León, Managua
Divisions: 11 Department of Materials and Earth Sciences > Earth Science
11 Department of Materials and Earth Sciences > Earth Science > Ecological Engineering
13 Department of Civil and Environmental Engineering Sciences
13 Department of Civil and Environmental Engineering Sciences > Institute of Hydraulic and Water Resources Engineering
13 Department of Civil and Environmental Engineering Sciences > Institute of Hydraulic and Water Resources Engineering > Engineering Hydrology and Water Management
11 Department of Materials and Earth Sciences
Event Title: Congreso Internacional de Ciencia, Tecnología y Educación para el Desarrollo Sostenible
Event Location: Universidad Tecnológica La Salle León, Managua
Event Dates: 19.-21.10.2016
Date Deposited: 08 Dec 2016 13:39
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