Talks and Poster Presentations (with Proceedings-Entry):
A. Herzig, D. Horvath, K. Kraus, K. Naumann:
"Renaturalization of Parts of the National Park Neusiedler See-Seewinkel/Fertö-Hansag by the Aid of Laser Scanning";
Talk: International Symposium of CIPA,
- 2002-09-21; in: "The ISPRS International Archives of Photogrammetry, Remote Sensing and Spatial Information Sciences",
The Neusiedler See is situated at the lowest point of the Small Hungarian Plain, in a basin without outlet, at about 113 metres above sea level and with a surface area of about 320 km2. East of the lake extends the Seewinkel plain with an area of about 450 km2. For the National Park the meadowlands, created through use for traditional haymaking, the remaining pastureland and the unique, frequently evaporating saltwater pans with their varying salinity levels are areas of particular interest. In the 20th century the water management in the Seewinkel (artificial draining, over-exploitation of groundwater) caused severe damage to the natural hydrological cycle and the aquatic ecosystems, and from 1900 to nowadays the water surface area was reduced by 75%. In the future, the environment Seewinkel needs to be managed in landscape units, based on integrative hydrological, physico-chemical, biological and socio-economic assessments. One aspect could be the renaturalization of parts of this landscape. Potential wetlands in the National Park Neusiedler See-Seewinkel/Fertö-Hansag can be detected by the aid of different sources. Historical maps are one possibility to reconstruct earlier positions of wetlands. Existing maps for this purpose are the land register from 1856 or different topographic maps as a product of the survey emerged in the 18th and 19th century. A more up to date and a very accurate method for locating potential wetlands is the new technology of airborne laser scanning to generate digital terrain models. Due to the very high point density of laser scanner data, even very shallow natural depressions can be determined. A short introduction of the technical background of this way of data acquisition is presented. Furthermore the issue of the derivation of digital terrain models from laser scanner data is addressed. Finally the combination of the digital model and orthophotos and land register is effectuated. Such a fusion of data is performed in a geographic information system (GIS).
Electronic version of the publication:
Created from the Publication Database of the Vienna University of Technology.