A stochastic, spatially explicit method for assessing the impact of land cover classification error on distributed hydrologic modeling is presented. One-hundred land cover realizations were created by systematically altering the North American Landscape Characterization land cover data according to the dataset’s misclassification matrix. The matrix indicates the probability of errors of omissio...

The characteristics of rainfall-runoff relations were hypothesized for the study area using existing infonnation. These hypotheses were incorporated into the Hydrologic Simulation Program-FURmAN, and the rrodel was calibrated concurrently at 21 strearn-gage sites in the study area. The simulation e=ors after rrodel calibration were not large enough to reject the hypothesized characteristics. A ...

Estimation of parameters of a hydrologic model is undertaken using a procedure called “calibration” in order to obtain predictions as close as possible to observed values. This study aimed to use the particle swarm optimization (PSO) algorithm for automatic calibration of the HEC-HMS hydrologic model, which includes a library of different event-based models for simulating the rainfall-runoff pr...

Physics-based distributed hydrologic models (DHMs) simulate multiple hydrologic states at numerous locations within a watershed, and at fine time intervals [1-7]. As the spatio-temporal resolution of model simulation becomes finer and number of predicted hydrologic states becomes larger, model simulations become more and more computationally intensive, rendering solution of large problems intra...

This paper reports a current GIS research project which is being undertaken in the Tweed area of north coast New South Wales. The project focuses on drainage management problems which are of increasing concern for land and environmental management for the sugar industry in this area. GIS network capabilities are employed with enhancements of specific needs for the drainage simulation. Natural a...

Component software architectures offer an alternative approach for building large, 4 complex hydrologic modeling systems. In contrast to more traditional software 5 paradigms (i.e. procedural or object-oriented approaches), using component-based 6 approaches allows individuals to construct autonomous modeling units that can be linked 7 together through shared boundary conditions during a simula...

A wealth of freely available hydrologic data are provided by governmental organizations including in situ observations, geospatial data sets, remote sensing products, and simulation model output. Despite having access to this information, much of the data remain underutilized in the hydrologic sciences due in part to the time required to access, obtain, and integrate data from different sources...