Some Factors Affecting Baseflow

Singh, Krishan P.

doi:10.1029/wr004i005p00985

Cited by 71 publications

(39 citation statements)

References 4 publications

(1 reference statement)

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“…Singh (1968) estimated baseflow by the Boussinesq assumption, in which baseflow was influenced by the height of the water table and geohydrological characteristics. The two types of boundary condition and the linearized Boussinesq equation used in Singh (1968) were also used in this study. The two boundary conditions are described in more detail later in this paper.…”

Section: Introductionmentioning

confidence: 99%

Regional daily baseflow prediction

Tung¹,

Hong²,

Chen³

et al. 2004

Hydrological Processes

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Abstract:The purposes of this study are to identify the bias of applying the analysis of a log-log plot of baseflow and to derive an equation to describe successive regional mean baseflow. The function dQ/dt D a Q b has been used to describe baseflow in many studies that obtain the values of a and b from the log-log plot. According to analysis in this study, the value of 1 can be assigned to b in two boundary conditions, but the parameter a is proved to be related to the depth of water table and starting time of recession and thus different values of a may be found for different recession events. This paper points out that no single regression line can be obtained by plotting all baseflow data on a log-log diagram. Instead, there should be parallel lines, and each for a recession event. It implies that no single set of parameters a and b can be applied to predict baseflow. Thus, a new equation describing the relationship between three successive mean baseflows was derived in this study. The bias in the analysis of the log-log plot and the ability of the derived equation to predict baseflow were verified for five watersheds in Taiwan. Results indicate that the formula of mean baseflow prediction can provide reasonable estimates of flows with a leading time of 6 days. Furthermore, stream flows of the Tonkawa creek watershed in USA were used to verify that using average flows can result in better predictions than using instantaneous flows.

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Section: Introductionmentioning

confidence: 99%

Regional daily baseflow prediction

Tung¹,

Hong²,

Chen³

et al. 2004

Hydrological Processes

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“…Most aquifers present one single recession coefficient, but some may have several. Boussinesq (1904), Barnes (1939), Drogue (1967Drogue ( , 1972, Schöeller (1967), Singh (1968), Hall (1968), Mangin (1970) and Tallaksen (1995), explain the hydrological significance of recession curves.…”

Section: Proposed Calculation Methodsmentioning

confidence: 99%

A method to assess annual average renewable groundwater reserves for large regions in Spain

Sanz

Recio

2011

Hydrological Sciences Journal

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This paper proposes a method for assessing the renewable groundwater reserves of large regions for an average year, based on the integration of the recession curves for their basins' springs or the natural baseflow of their rivers. In this method, the hydrodynamic volumes (or renewable reserves), were estimated from the baseflow. It was assumed that the flow was the same as the natural recharge, and the recession coefficients were derived from the hydrogeological parameters and geometric characteristics of the aquifers and adjusted to fit the recession curves at gauging stations. The method was applied to all the aquifers of Spain, which have a total renewable groundwater reserve of 86 118 hm 3 -four times the mean annual recharge. However, the spatial distribution of these reserves is highly variable; 18.6% of the country's aquifers contain 94.7% of the entire reserve.Key words renewable groundwater reserves; baseflow; Spain Une méthode pour évaluer les réserves annuelles moyennes en eaux souterraines renouvelables pour les grandes régions d'EspagneRésumé Cet article propose une méthode pour évaluer les réserves en eaux souterraines renouvelables de grandes régions pour une année moyenne, basée sur l'intégration des courbes de récession des sources de leurs bassins versants ou sur le débit de base naturel de leurs rivières. Dans cette méthode, les volumes hydrodynamiques (ou réserves renouvelables) ont été estimés à partir du débit de base. On a supposé que l'écoulement vaut la recharge naturelle, et les coefficients de récession ont été déduits des paramètres hydrogéologiques et des caractéristiques géométriques des aquifères et ajustés vis-à-vis des courbes de récession aux stations de jaugeage. La méthode a été appliquée à tous les aquifères de l'Espagne, qui ont une réserve totale d'eau souterraine renouvelable de 86 118 hm 3 -quatre fois la recharge annuelle moyenne. Cependant, la répartition spatiale de ces réserves est très variable; 18.6% des aquifères du pays contiennent 94.7% de toute la réserve.

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“…Barnes(1939)는 반대수지상에서 지하 수 감수곡선이 직선적으로 변화한다고 하였으며, 이후 Singh(1968)를 비롯한 다수의 학자들이 지수함수식을 이 용하여 감수곡선 계수를 산정한 이래, 감수계수에 관한 연 구가 많이 이루어졌다 (Martin, 1973;Klassen and Pilgrim, 1975;Tallaken, 1995). 대표적인 연구사례로서, Vogel and Kroll(1992) …”

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Analysis of Secular Changes in the Hydrological Characteristics of a Small Forested Watershed using a Baseflow Recession Curve

Lee¹,

Lee²

2014

Journal of Korean Forest Society

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Long-term changes in the hydrological characteristics of a small forest watershed were examined using a master baseflow recession curve and the measured rainfall-runoff data from the experimental forest watershed in the measured years 2003-2011. The results of the study showed that the recession coefficient of direct runoff was lower than that of baseflow. In small forested watershed, the direct flow was lower than that of large scale watershed, flow due to its shorter period of occurrence. And baseflow was similar to large scale watershed's. A regression equation y = 0.7528e.8938, range 0.3~0.8 mm) was obtained using the master baseflow recession curve for the study period and the recession coefficient was calculated as K = 0.978. Changes between master baseflow recession curve and runoff showed great association and relevance such as increasing runoff was associated with the gentle slope of master baseflow recession curve and decreasing runoff was associated with the slope of master baseflow recession curve contrary. In the later years of the study period, the slope of the master baseflow recession curve appreciably became more gentle due to increases in baseflow. This suggests that the forested experimental watershed exhibit improved structural functioning of normal flood control and reduced occurrence of water shortage problems.

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Some Factors Affecting Baseflow

Cited by 71 publications

References 4 publications

Regional daily baseflow prediction

Regional daily baseflow prediction

A method to assess annual average renewable groundwater reserves for large regions in Spain

Analysis of Secular Changes in the Hydrological Characteristics of a Small Forested Watershed using a Baseflow Recession Curve

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