Discharge hydrograph
The discharge curve , also hydrograph , is the representation or summation of observed or calculated discharges for a water level location in the sequence of their occurrence over time (water flow curve at the water gauge).
Usually a discharge hydrograph has a certain shape. The curve rises quickly when peak discharge values are reached due to flooding. After the maximum discharge value ( discharge peak) has been reached, the curve quickly decreases again. After a certain time, there is a continuous decrease in the discharge values.
composition
A discharge hydrograph can basically be divided into three areas, dry weather discharge, direct discharge and base discharge.
As a direct drain the water quantities are referred to, with only minimal delay the outfall reach and generate floods. This direct flow can be further subdivided into surface (overland flow) and intermediate flow (interflow). This area of the chart is characterized by a rapid increase in the flow speed and thus an increase in the transport power.
As a base flow (base flow) the parts of the water are called, which reach the receiving water only after considerable delay. It is made up of the groundwater runoff and the delayed intermediate runoff.
See also
literature
- Frank Ahnert: Introduction to Geomorphology (= Uni-Taschenbücher. 8103). 3rd, updated and supplemented edition. Ulmer, Stuttgart 2003, ISBN 3-8252-8103-5 .
- Wolfhard Symader: What happens when the rain falls? (= UTB. 2496). Ulmer, Stuttgart 2004, ISBN 3-8001-2818-7 .
- Friedrich Wilhelm: Hydrogeography. Basics of general hydrogeography. 3rd, improved edition. Westermann, Braunschweig 1997, ISBN 3-14-160279-4 .
Web links
Individual evidence
- ↑ taken from: www.wasser-wissen.de