scholarly journals Reply to comment by C. Michel on “A base flow separation algorithm based on the linearized Boussinesq equation for complex hillslopes”

2006 ◽  
Vol 42 (6) ◽  
Author(s):  
Valentijn R. N. Pauwels ◽  
Annelies A. O. Huyck ◽  
Niko E. C. Verhoest
Keyword(s):  
Flow Separation ◽  
Boussinesq Equation ◽  
Base Flow ◽  
Separation Algorithm ◽  
Linearized Boussinesq Equation ◽  
Base Flow Separation

scholarly journals WebGIS development for base flow separation and recharge estimation

2020 ◽  
Vol 27 (3) ◽  
pp. 62-71
Author(s):  
Taison Anderson Bortolin ◽  
Lucas Moraes Dos Santos ◽  
Adriano Gomes Da Silva ◽  
Vania Elisabete Schneider
Keyword(s):  
Information System ◽  
Programming Languages ◽  
Flow Separation ◽  
Base Flow ◽  
Geographical Information ◽  
Mathematical Methods ◽  
Hydrological Data ◽  
Historical Series ◽  
Base Flow Separation ◽  
Water Recharge

The basic flow rate is characterized by an important hydrological component being responsible for the estimation of the water recharge. Due to the difficulty of measurement, mathematical methods are used to calculate the flow separation. However, when hydrographic analysis is based on long historical series, the use of these methods becomes impracticable, making it necessary to use computational resources. A WebGIS (Web Geographical Information System) was developed for data selection and calculation of base flow separation, based on hydrological data from fluviometric stations located in the Taquari-Antas basin, located in the state of Rio Grande do Sul. A modified version of the Unified Process was used as a software development methodology. We used the MVC software architecture standard and the programming languages PHP 7.0, HTML5, JS and CSS3 for programmatic development of the constituent layers of the system. The hydrological data comes from the HIDROWEB portal, part of the National Information System on Water Resources (SNIRH), with hydrological information collected by the National Hydrometeorological Network (RHN) coordinated by the National Water Agency (ANA). The system facilitates the use of remote and distributed hydrological data, shared over the Internet, for various hydrological analyzes.

scholarly journals A synthetic study to evaluate the utility of hydrological signatures for calibrating a base flow separation filter

2016 ◽  
Vol 52 (8) ◽  
pp. 6526-6540 ◽  
Author(s):  
Chun-Hsu Su ◽  
Tim J. Peterson ◽  
Justin F. Costelloe ◽  
Andrew W. Western
Keyword(s):  
Flow Separation ◽  
Base Flow ◽  
Base Flow Separation ◽  
Hydrological Signatures

Basin-Scale Assessment of Operational Base Flow Separation Methods

2015 ◽  
Vol 20 (5) ◽  
pp. 04014074 ◽  
Author(s):  
T. A. Stadnyk ◽  
J. J. Gibson ◽  
F. J. Longstaffe
Keyword(s):  
Flow Separation ◽  
Base Flow ◽  
Scale Assessment ◽  
Basin Scale ◽  
Base Flow Separation

scholarly journals Comparison of different base flow separation methods in a lowland catchment

2009 ◽  
Vol 13 (11) ◽  
pp. 2055-2068 ◽  
Author(s):  
A. L. Gonzales ◽  
J. Nonner ◽  
J. Heijkers ◽  
S. Uhlenbrook
Keyword(s):  
Flow Separation ◽  
Base Flow ◽  
Water Levels ◽  
Runoff Generation ◽  
Flow Process ◽  
Groundwater Levels ◽  
Groundwater Assessment ◽  
Base Flow Separation ◽  
Lowland Area ◽  
The Impact

Abstract. Assessment of water resources available in different storages and moving along different pathways in a catchment is important for its optimal use and protection, and also for the prediction of floods and low flows. Moreover, understanding of the runoff generation processes is essential for assessing the impacts of climate and land use changes on the hydrological response of a catchment. Many methods for base flow separation exist, but hardly one focuses on the specific behaviour of temperate lowland areas. This paper presents the results of a base flow separation study carried out in a lowland area in the Netherlands. In this study, field observations of precipitation, groundwater and surface water levels and discharges, together with tracer analysis are used to understand the runoff generation processes in the catchment. Several tracer and non-tracer based base flow separation methods were applied to the discharge time series, and their results are compared. The results show that groundwater levels react fast to precipitation events in this lowland area with shallow groundwater tables. Moreover, a good correlation was found between groundwater levels and discharges suggesting that most of the measured discharge also during floods comes from groundwater storage. It was estimated using tracer hydrological approaches that approximately 90% of the total discharge is groundwater displaced by event water mainly infiltrating in the northern part of the catchment, and only the remaining 10% is surface runoff. The impact of remote recharge causing displacement of near channel groundwater during floods could also be motivated with hydraulic approximations. The results show further that when base flow separation is meant to identify groundwater contributions to stream flow, process based methods (e.g. the rating curve method; Kliner and Knezek, 1974) are more reliable than other simple non-tracer based methods. Also, the recursive filtering method (proposed by Eckhardt, 2005) can be calibrated well using the results of tracer investigation giving good results. Consequently, non-tracer based base flow separation methods that can be validated for some events may provide a powerful tool for groundwater assessment or model calibration/validation in lowland areas.

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