Heuristic Continuous Base Flow Separation
نویسنده
چکیده
A digital filtering algorithm for continuous base flow separation is compared to physically based simulations of base flow. It is shown that the digital filter gives comparable results to model simulations in terms of the multiyear base flow index when a filter coefficient is used that replicates the watershed-specific time delay of model simulations. This way, the application of the heuristic digital filter for practical continuous base flow separation can be justified when auxiliary hydrometeorological data ~such as precipitation and air temperature! typically required for physically based base flow separation techniques are not available or not representative of the watershed. The filter coefficient can then be optimized upon an empirical estimate of the watershed-specific time delay, requiring only the drainage area of the watershed. DOI: 10.1061/~ASCE!1084-0699~2004!9:4~311! CE Database subject headings: Base flow; Digital filters; Runoff; Streamflow; Algorithms.
منابع مشابه
Evaluation of base flow separation methods for determining water extraction (Case study: Gorganroud River Basin)
متن کامل
The 0-1 Knapsack problem with a single continuous variable
Constraints arising in practice often contain many 0-1 variables and one or a small number of continuous variables. Existing knapsack separation routines cannot be used on such constraints. Here we study such constraint sets, and derive valid inequalities that can be used as cuts for such sets, as well for more general mixed 0-1 constraints. Specifically we investigate the polyhedral structure ...
متن کاملExponential smoothing method of base flow separation and its impact on continuous loss estimates
The calculation of loss is vital for design flood estimation models and in order to estimate continuing loss (CL), proportional loss (PL) and volumetric runoff coefficient, the surface runoff has to be separated from the total given in a stream flow hydrograph. To obtain the volume of surface runoff from the streamflow hydrograph, baseflow separation becomes necessary and in this paper a few ba...
متن کاملمقایسه روش‌های برآورد دبی پایه بر اساس تفکیک هیدروگراف جریان(مطالعه موردی حوزه آبخیز کارون)
Estimating the volume of groundwater contribution to runoff within a watershed is one of the most important subjects in water resources management and hydrology. In this paper, groundwater contribution to total runoff as a base flow index was estimated using hydrograph separation in six stream gauging stations in southwest of Iran. The major objective of this research is to distinguish the most...
متن کاملمقایسه روش‌های برآورد دبی پایه بر اساس تفکیک هیدروگراف جریان(مطالعه موردی حوزه آبخیز کارون)
Estimating the volume of groundwater contribution to runoff within a watershed is one of the most important subjects in water resources management and hydrology. In this paper, groundwater contribution to total runoff as a base flow index was estimated using hydrograph separation in six stream gauging stations in southwest of Iran. The major objective of this research is to distinguish the most...
متن کامل