Are floods in part a form of land use externality?

Article


Dorner, W., Porter, M. and Metzka, R.. 2008. "Are floods in part a form of land use externality?" Natural Hazards and Earth System Sciences. 8 (3), pp. 523-532.
Article Title

Are floods in part a form of land use externality?

ERA Journal ID123026
Article CategoryArticle
AuthorsDorner, W. (Author), Porter, M. (Author) and Metzka, R. (Author)
Journal TitleNatural Hazards and Earth System Sciences
Journal Citation8 (3), pp. 523-532
Number of Pages10
Year2008
Place of PublicationGoettingen, Germany
ISSN1561-8633
1684-9981
Web Address (URL)http://www.nat-hazards-earth-syst-sci.net/special issues.html
Abstract

Peak and volume of river flows are functions of the catchment surface characteristics. This means that any impacts to the run-off regime (for example surface sealing and river training) could affect people and land users in the lower system. The costs of flood defence or compensation of damages are usually not included in the economic calculation of the upstream land owner or land user. In economic terms these effects are referred to as unidirectional externalities. This paper presents a methodology to identify externalities elated to land use and run-off and describes the relevant cause-effect relations and how they can be modelled. The Herzogbach is a small tributary of the Danube River in Lower Bavaria. It is located in a rural area, dominated by intensive farming practices. A combination of hydrological and hydraulic modelling provided the core of the project methodology to allow the interpretation of economic data. Comparisons of damage estimates resulting from different hydrological scenarios based on different land uses, and flood mitigation costs were used to show the economic significance of human impacts.

Keywordsflood damage; hydrological; hydraulic modelling; economic analysis
ANZSRC Field of Research 2020370704. Surface water hydrology
401199. Environmental engineering not elsewhere classified
380105. Environment and resource economics
Byline AffiliationsUniversity of Applied Sciences Deggendorf, Germany
Australian Centre for Sustainable Catchments
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