Based on the classical biological Monod-Model a so called double-limited selfpurification model working in an aggregate water resource is constructed. From this model we derive a stationary selfpurificaton function and three conditions for ecological sustainable development.

Generation of drinking water from polluted raw water requires to reduce water pollution by overall emissions control, by technical raw water purification and/or by installing water protection areas. To achieve efficiency the purification effort must be equalised at all of these three margins. In...

Die umweltökonomische Literatur verwendet mehrere stark unterschiedliche Hypothesen über Selbstreinigungsprozesse in Wasserressourcen. Dieser Aufsatz stellt naturwissenschaftliche Selbstreinigungsmodelle vor, leitet aus diesen stationäre Selbstreinigungsfunktionen her und überprilft, welche...