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Rainfall Intervention Analysis for On‐Line Applications
Publisher: American Society of Civil Engineers
Abstract: Rainfalls during summer season are a major cause of sporadic nonlinear transient drops in daily municipal water consumption. The nonhomogeneous, nonlinear effects induced by rainfall interventions on water use complicate ...
Bivariate Drought Recurrence Analysis Using Tree Ring Reconstructions
Publisher: American Society of Civil Engineers
Abstract: Droughts may be represented by two main characteristics—duration and severity. In this paper, a general methodology to evaluate the frequency and risk of the occurrence of droughts is presented using a bivariate drought ...
Representation of Spatial Variability of Rainfall in Aggregated Rainfall‐Runoff Models
Publisher: American Society of Civil Engineers
Abstract: The aggregated‐precipitation input to a catchment is defined in this work as one that minimizes an objective measure of the difference between the calculated and the observed hydrograph. This measure is different from the ...
Synthetic Generation of Hydrologic Time Series Based on Nonparametric Random Generation
Publisher: American Society of Civil Engineers
Abstract: Synthetic hydrologic time series can be used to quantify the uncertainty of a water resources system. Conventional parametric models, such as autoregressive moving average or Markovian models, assume that the variable under ...
Nonlinear Model for Drought Forecasting Based on a Conjunction of Wavelet Transforms and Neural Networks
Publisher: American Society of Civil Engineers
Abstract: Droughts are destructive climatic extreme events that may cause significant damage both in natural environments and in human lives. Drought forecasting plays an important role in the control and management of water resources ...
Estimation of Flood Frequencies for Ungaged Catchments
Publisher: American Society of Civil Engineers
Abstract: Accurate flood frequency curves are difficult to obtain for ungaged catchments. A typical procedure uses a simulation model to compute peak discharges where the recurrence interval is assumed to be equal to that of the ...
Multidimensional Rainfall Parameter Estimation from Sparse Network
Publisher: American Society of Civil Engineers
Abstract: The multidimensional precipitation model proposed by Waymire et al. provides realistic representations of the rainfall process. The model, however, in its most simplified form requires the numerical evaluation of nine ...
Adaptive Parameter Estimation for Multisite Hydrologic Forecasting
Publisher: American Society of Civil Engineers
Abstract: TWO stochastic modeling approaches for multisite hydrologic forecasting are presented in this work. The models are of ARMAX class expressed in state‐space formulations. The first approach, the adaptive partitioning, models ...
Nonparametric Approach for Estimating Return Periods of Droughts in Arid Regions
Publisher: American Society of Civil Engineers
Abstract: Droughts cause severe damage in terms of both natural environments and human lives, and hydrologists and water resources managers are concerned with estimating the relative frequencies of these events. Univariate parametric ...
Nonparametric Approach for Bivariate Drought Characterization Using Palmer Drought Index
Publisher: American Society of Civil Engineers
Abstract: A drought is usually represented by duration and severity, and may last several months or years. Multidimensional characteristics of a drought make univariate analysis unable to reveal the significant relationship among ...