Hydrologic Model Parameter Optimisation

نویسنده

  • W. J. Cohen
چکیده

Deterministic rainfall-runoff models require parameter calibration with the aim of matching the modeled streamflow record to an observed record as closely as possible. Much attention has been focused on automated methods of model calibration using meta-heuristics, such as genetic algorithms. In this study, two meta-heuristic algorithms were compared: the shuffled complex evolution (SCE) algorithm and a real coded genetic algorithm (GA). The GA was modified with a fitness scaler based on a Boltzmann distribution, which was used to adjust the level of elitism of the selection operator. This was found to improve the performance of the GA. The algorithms were compared using a range of configurations on two test problems the two parameter Rosenbrock function and the six parameter Hartman function. A relatively small number of objective function evaluations were allowed so as to test the ability of the functions to converge under adverse conditions (that is, limited computational runtime). These functions were found to be best solved with different strategies. The Hartman function was found to respond better to a more elitist strategy, and the Rosenbrock function was solved with a more egalitarian strategy with higher population diversity. On both functions, the best configuration of the SCE algorithm was found to perform favorably compared to the best configurations of the GA. The best performing configurations of these algorithms were applied to the calibration of a rainfall runoff model of a catchment in Tasmania. The model was a two-tap Australian Water Balance Model (AWBM) consisting of eight parameters, with 10 years of data and a six month warm up period. 20 trials were performed on each algorithm, and in each trial the data were randomly split into train and test sets of nine and one year’s data respectively. The more egalitarian strategies (which maintain higher population diversity, as taken from the algorithm configurations found to best suit the Rosenbrock function) were found to be favorable for both the SCE and the GA. When comparing results on the test data, this difference was marginal. The difference in performance was more apparent on the results of the SCE algorithm. A recommendation of this paper is to develop a catalogue of the performance of several algorithms under different configurations on a range of test objective functions. This could be used to assist in the configuration of meta-heuristics on a range of applied problems, such as the calibration of additional rainfall runoff models.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Optimisation of wire-cut EDM process parameter by Grey-based response surface methodology

Wire electric discharge machining (WEDM) is one of the advanced machining processes. Response surface methodology coupled with Grey relation analysis method has been proposed and used to optimise the machining parameters of WEDM. A face centred cubic design is used for conducting experiments on high speed steel (HSS) M2 grade workpiece material. The regression model of significant factors such ...

متن کامل

A one-parameter Budyko model for water balance captures emergent behavior in darwinian hydrologic models

Hydrologic models can be categorized as being either Newtonian or Darwinian in nature. The Newtonian approach requires a thorough understanding of the individual physical processes acting in a watershed in order to build a detailed hydrologic model based on the conservation equations. The Darwinian approach seeks to explain the behavior of a hydrologic system as a whole by identifying simple an...

متن کامل

تخمین عدم قطعیت مدل شبیه سازی سیلاب HEC-HMS با استفاده از الگوریتم مونت کارلو زنجیره مارکوف

There are some parameters in hydrologic models that cannot be measured directly. Estimation of hydrologic model parameters by various approaches and different optimization algorithms are generally error-prone, and therefore, uncertainty analysis is necessary. In this study we used DREAM-ZS, Differential Evolution Adaptive Metropolis, to investigate uncertainties of hydrologic model (HEC-HMS) pa...

متن کامل

On the use of multiple criteria for a posteriori model rejection: Soft data to characterize model performance

[1] Land surface hydrologic models are commonly evaluated based upon the degree of correspondence between measured and modeled discharge. In this paper we illustrate significant shortcomings associated with the simple discharge based evaluation strategy. A standard conceptual hydrologic model is applied within a Monte Carlo framework to two catchments representing significantly different hydrol...

متن کامل

The impact of parameter lumping and geometric simplification in modelling runoff and erosion in the shrublands of southeast Arizona

There have been many studies of hydrologic processes and scale. However, some researchers have found that predictions from hydrologic models may not be improved by attempting to incorporate the understanding of these processes into hydrologic models. This paper quantifies the effect of simplifying watershed geometry and averaging the parameter values on simulations generated using the KINEROS2 ...

متن کامل

J5.4 Use of Weather Radar with Lumped Parameter Hydrologic Models

Lumped parameter hydrologic models are frequently used for operational streamflow forecasting in the United States. With the deployment of the Weather Surveillance Radar 1988 Doppler (WSR88D), many hydrologists will use radar-rainfall data as input to these models. WSR-88D precipitation products can be used in a variety of ways (Shedd and Fulton, 1993; Lindsey, 1993). In this paper, we examine ...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2013