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There are several processes which affect the oxygen budget. High temperatures accelerate biological processes e.g. mineralization of organic compounds, and lead in combination with a low input of oxygen rich freshwater to low concentrations of oxygen. Furthermore the large water depth within the harbor basis and downstream of Hamburg harbor, results in a settlement of phytoplankton from the sun lightened part of the water column into the dark zone of the water. The algae subsequently die and cannot produce oxygen anymore. In the contrary they serve as organic material ready to be broken down by bacteria under oxygen consumption.
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Managing Reiherstieg sluice to improve oxygen conditions
Table of content
- 1. Measure description
- 1a. Introduction
- 1b. Objectives
- 1c. Background and side conditions
- 1d. Measure
- 1e. Expected effect
- 2. Execution of the main effectiveness criteria
- 2a. Effectiveness according to development targets of measure
- 2b. Impact on ecosystem services
- 2c. Degree of synergistic effects and conflicts according the uses
- 3. Additional evaluation criteria in view of EU environmental law
- 3a. Degree of synergistic effects and conflicts according WFD aims
- 3b. Degree of synergistic effects and conflicts according NATURA 2000 aims
- 4. Crux of the matter
- 5. Contact
- 6. References
Additional information
for this measure:
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for this measure:
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Background and side conditions
Hamburg Port Authority is planning a reconstruction of the sluice ‘Reiherstieg’. In this context it investigated in which way the opening times of the sluice will further affect the oxygen budget of the ‘Reiherstieg’ area.There are several processes which affect the oxygen budget. High temperatures accelerate biological processes e.g. mineralization of organic compounds, and lead in combination with a low input of oxygen rich freshwater to low concentrations of oxygen. Furthermore the large water depth within the harbor basis and downstream of Hamburg harbor, results in a settlement of phytoplankton from the sun lightened part of the water column into the dark zone of the water. The algae subsequently die and cannot produce oxygen anymore. In the contrary they serve as organic material ready to be broken down by bacteria under oxygen consumption.