IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 34th Congress - Brisbane (2011) : THEME 3: Water and Carbon: Climate Change Impact : Hydrograph analysis for parameter estimation of connected and karst systems
Hydrograph analysis for parameter estimation of connected and karst systems
Author : A. Kovacs1 & P. Perrochet2
A new approach to characterising connected and karst water systems by means of hydrograph analysis has been developed. Two-dimensional analytical solutions for baseflow discharge facilitate a quantitative baseflow separation, and can be applied for the estimation of aquifer hydraulic parameters by means of hydrograph analysis. An extensive numerical study has been undertaken to verify the validity of analytical formulae. According to the analytical solution, baseflow can be expressed as a superposition of an infinite number of exponential components. Higher order components vanish at early stages of the recession process. This explains the imaginary exponential behaviour of baseflow. In reality, the recession coefficient calculated for each time step monotonically decreases over time, as confirmed by numerical model simulations. An analytical solution for diffusive flux from symmetric and asymmetric rectangular blocks has been developed.
File Size : 998,874 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 34th Congress - Brisbane (2011)
Article : THEME 3: Water and Carbon: Climate Change Impact
Date Published : 01/07/2011
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