Evaluation and modeling of soil water infiltration are essential to all aspects of water resource... more Evaluation and modeling of soil water infiltration are essential to all aspects of water resources management and the design of hydraulic structures. Nonetheless, research focused on experimental studies of infiltration rates in arid and semi-arid regions under unknown boundary conditions remains minimal. This paper investigates the characteristics of the spatial variability of infiltration over a semi-arid rural basin of Algeria. The experiments were conducted using a portable double-ring infiltrometer filled at an equal volume of approximately 100 L of water for each of the 25 catchment locations. Soil moisture contents at the proximity of each test location were evaluated in the laboratory as per the standard NF P94–050 protocol. The experimental results are used to produce the catchment infiltration curves using three statistically fitted infiltration models, namely Horton, Kostiakov, and Philip models. The reliability of the models was assessed using four performance criteria. ...
Advances in Science, Technology & Innovation, 2019
This study is a new application of the recession curve analysis with a new non-subjective method.... more This study is a new application of the recession curve analysis with a new non-subjective method. Its objective is to construct master recession curves generated by placing, horizontally, the vertex of individual recession segments of the most suitable connection line defined by measurement points of a preceding recession segment. This proposed methodology was applied for a rural catchment with a low urban contribution, namely Madjez Ressoul, which is located in the Ain Berda region in Algeria. The results of separation always give an appropriate R2 coefficient; they confirm the ability to calculate the recession curve coefficient k of the three processes (surface flow, subsurface flow and baseflow).
Empirical models of recession analysis provide information about surface and ground flow processe... more Empirical models of recession analysis provide information about surface and ground flow processes during periods of drought. The objective of this research is to evaluate the performance of three different techniques (individual segments, filtering method, genetic algorithms) in assessing the contribution of recession flow component in calculating runoff, using daily records of discharge. These techniques will focus on the values of the recession index covering ten flood events in the period of 1973-2003. The outputs of these models were then compared and their results appeared to validate two particular techniques: the filtering method with one parameter and the genetic algorithm method. The coefficient of determination (R 2 = 0.7324-0.935) and the cross probability which equals 0.9 confirm the best separation of all events. Absolute similarities between flow types in the filtering method and genetic algorithms present systematic differences in the calibration form and on the consideration of obstacles and limitations.
Madjez Ressoul catchment constitutes an important source of fresh water and arable land in northe... more Madjez Ressoul catchment constitutes an important source of fresh water and arable land in northeastern Algeria. In order to achieve better management of the catchments' natural resources, specifically water, an advanced flood recession analysis was conducted, using the recession analysis-based trigonometric approach, which was based completely on a mathematical solution. This approach provides very useful results for the master recession curves construction. The advantage of this method in the hydrograph separation is both its non-subjectivity related to the user, and then its viability for initial use in the hydrograph separation field. Results in this real case give a better indication of groundwater flow during different drought periods, using many assessed parameters of initial discharge and relative recession time. A particular review of existing hydrograph separation techniques is used to situate the recession analysis and show its case of application relative to other techniques.
Evaluation and modeling of soil water infiltration are essential to all aspects of water resource... more Evaluation and modeling of soil water infiltration are essential to all aspects of water resources management and the design of hydraulic structures. Nonetheless, research focused on experimental studies of infiltration rates in arid and semi-arid regions under unknown boundary conditions remains minimal. This paper investigates the characteristics of the spatial variability of infiltration over a semi-arid rural basin of Algeria. The experiments were conducted using a portable double-ring infiltrometer filled at an equal volume of approximately 100 L of water for each of the 25 catchment locations. Soil moisture contents at the proximity of each test location were evaluated in the laboratory as per the standard NF P94–050 protocol. The experimental results are used to produce the catchment infiltration curves using three statistically fitted infiltration models, namely Horton, Kostiakov, and Philip models. The reliability of the models was assessed using four performance criteria. ...
Advances in Science, Technology & Innovation, 2019
This study is a new application of the recession curve analysis with a new non-subjective method.... more This study is a new application of the recession curve analysis with a new non-subjective method. Its objective is to construct master recession curves generated by placing, horizontally, the vertex of individual recession segments of the most suitable connection line defined by measurement points of a preceding recession segment. This proposed methodology was applied for a rural catchment with a low urban contribution, namely Madjez Ressoul, which is located in the Ain Berda region in Algeria. The results of separation always give an appropriate R2 coefficient; they confirm the ability to calculate the recession curve coefficient k of the three processes (surface flow, subsurface flow and baseflow).
Empirical models of recession analysis provide information about surface and ground flow processe... more Empirical models of recession analysis provide information about surface and ground flow processes during periods of drought. The objective of this research is to evaluate the performance of three different techniques (individual segments, filtering method, genetic algorithms) in assessing the contribution of recession flow component in calculating runoff, using daily records of discharge. These techniques will focus on the values of the recession index covering ten flood events in the period of 1973-2003. The outputs of these models were then compared and their results appeared to validate two particular techniques: the filtering method with one parameter and the genetic algorithm method. The coefficient of determination (R 2 = 0.7324-0.935) and the cross probability which equals 0.9 confirm the best separation of all events. Absolute similarities between flow types in the filtering method and genetic algorithms present systematic differences in the calibration form and on the consideration of obstacles and limitations.
Madjez Ressoul catchment constitutes an important source of fresh water and arable land in northe... more Madjez Ressoul catchment constitutes an important source of fresh water and arable land in northeastern Algeria. In order to achieve better management of the catchments' natural resources, specifically water, an advanced flood recession analysis was conducted, using the recession analysis-based trigonometric approach, which was based completely on a mathematical solution. This approach provides very useful results for the master recession curves construction. The advantage of this method in the hydrograph separation is both its non-subjectivity related to the user, and then its viability for initial use in the hydrograph separation field. Results in this real case give a better indication of groundwater flow during different drought periods, using many assessed parameters of initial discharge and relative recession time. A particular review of existing hydrograph separation techniques is used to situate the recession analysis and show its case of application relative to other techniques.
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Papers by Asma Dahak