Fully Automated Objective-Based Method for Master Recession Curve Separation
Article first published online: 20 JAN 2010
Copyright © 2010 The Author(s). Journal compilation © 2010 National Ground Water Association
Volume 48, Issue 4, pages 598–603, July/August 2010
How to Cite
Posavec, K., Parlov, J. and Nakić, Z. (2010), Fully Automated Objective-Based Method for Master Recession Curve Separation. Groundwater, 48: 598–603. doi: 10.1111/j.1745-6584.2009.00669.x
- Issue published online: 22 JUN 2010
- Article first published online: 20 JAN 2010
- Received June 2009, accepted December 2009.
The fully automated objective-based method for master recession curve (MRC) separation was developed by using Microsoft Excel spreadsheet and Visual Basic for Applications (VBA) code. The core of the program code is used to construct an MRC by using the adapted matching strip method (Posavec et al. 2006). Criteria for separating the MRC into two or three segments are determined from the flow-duration curve and are represented as the probable range of percent of flow rate duration. Successive separations are performed automatically on two and three MRCs using sets of percent of flow rate duration from selected ranges and an optimal separation model scenario, having the highest average coefficient of determination R2, is selected as the most appropriate one. The resulting separated master recession curves are presented graphically, whereas the statistics are presented numerically, all in separate sheets. Examples of field data obtained from two springs in Istria, Croatia, are used to illustrate its application. The freely available Excel spreadsheet and VBA program ensures the ease of use and applicability for larger data sets.