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Improved non-linear transfer function and neural network methods of flow routing for real-time forecasting
non-linear transfer function neural network methods flow routing real-time forecasting
2009/12/4
Data-based methods of flow forecasting are becoming increasingly popular due to their rapid development times, minimum information requirements, and ease of real-time implementation, with transfer fun...
EC-SVM approach for real-time hydrologic forecasting
EC-SVM approach real-time hydrologic forecasting
2009/12/4
This study demonstrates a combined application of chaos theory and support vector machine (SVM) in the analysis of chaotic time series with a very large sample data record. A large data record is ofte...
Efficient implementation of inverse approach for forecasting hydrological time series using micro GA
Efficient implementation inverse approach hydrological time series micro GA
2009/12/4
This paper implements the inverse approach for forecasting hydrological time series in an efficient way using a micro-GA (mGA) search engine. The inverse approach is based on chaos theory and it invol...
GROUNDWATER TIME SERIES
GROUNDWATER TIME SERIES
2009/10/30
The term "stochastic hydrology" implies a statistical approach to hydrologic
problems as opposed to classic hydrology which can be considered deterministic
in its approach. During the International ...
Well hydrograph and change in well level map analysis, associated with
a small boulder clay catchment, detected a time lag response with the
causal factors rainfall and potential evapotranspiration....
STOCHASTIC TIME DISTRIBUTION OF STORM RAINFALL
STOCHASTIC TIME DISTRIBUTION STORM RAINFALL
2009/10/29
Increments of rainfall during a storm event were treated as stochastic
variates. Statistical distributions ol accumulated rain were developed at
2-hour intervals. Three-parameter lognormal distribut...
This paper presents kinematic solutions, both analytically and nomographically,
of surface water lag time for diverging overland flow. These solutions
can be utilized to estimate lag time from physi...
Order Selection of AR Models of Hydrologic Time Series
Order Selection AR Models Hydrologic Time Series
2009/10/28
Recently several criteria have been proposed for selection of orders of AR
models. One of these. namely the AIC has been used in hydrologic analysis.
However, the results given by these criteria whe...
Combination of a Conceptual Model and an Autoregressive Error Model for Improving Short Time Forecasting
Combination Conceptual Model Autoregressive Error Model
2009/10/28
An autoregressive error model has been tested on the residuals of the conceptual
HBV-model for the EmAn catchment. The autoregresslve model gives
considerable improvements for real shorttime forecas...
Sequential Generation of Short Time-Interval Rainfall Data
Sequential Generation Short Time-Interval Rainfall Data
2009/10/28
Hourly and six-minute interval models were developed to stochastically generate
sequences of rainfall depths. The models were applied to data recorded at
twelve rainfall stations in Australia, inclu...
Runoff Pattern and Peak Flows from Moving Block Rains Based on a Linear Time-Area Curve
Runoff Pattern Peak Flows Moving Block Rains Linear Time-Area Curve
2009/10/28
One of the most outstanding problems within urban drainage is to give a
statistically correct description of the runoff effect from areal and temporal
distributed rain storms. Due to the large numbe...
Time Lag Solution of the Muskingum Flood Routing Equation
Time Lag Solution Muskingum Flood Routing Equation
2009/10/28
Use of time lag in the Muskingum method of flood routing is explained by
considering some specific examples. Time lag method removes undesirable
predicted results which are obtained by the conventio...
Operational Spring Time Forecasting Difficulties and Improvements
Operational Time Forecasting Difficulties Improvements
2009/10/27
A modified version of HBV-3 model has been used since 1981 for operational
spring-time forecasting in Finland. This model is ready now for eleven river
basins ranging from 500 to 30,000 km2. From th...
The Potential of Real Time Control to reduce Combined Sewer Overflow
Real Time Control Combined Sewer Overflow
2009/10/26
The potential of Real Time Control (RTC) to reduce the overflow volume from
a combined sewer system has been investigated for a catchment in Copenhagen,
named Strandvaenget. The results have been co...
Validation and Intercomparison of Different Updating Procedures for Real-Time Forecasting
Validation and Intercomparison Updating Procedures Real-Time Forecasting
2009/10/23
The paper presents a classification and a review of the updating procedures currently
used in real-time flood fo~ecastingm odelling. On the basis of results from
the WMO project 'Simulated Real-Time...