Abstract
A distributed-framework basin modeling system (DFBMS) was developed to simulate the runoff generation and movement on a basin scale. This study is part of a series of papers on DFBMS that focuses on the hydraulic calculation methods in runoff concentration on underlying surfaces and flow movement in river networks and lakes. This paper introduces the distributed-framework river modeling system (DF-RMS) that is a professional modeling system for hydraulic modeling. The DF-RMS contains different hydrological feature units (HFUs) to simulate the runoff movement through a system of rivers, storage units, lakes, and hydraulic structures. The river network simulations were categorized into different types, including one-dimensional river branch, dendritic river network, loop river network, and intersecting river network. The DF-RMS was applied to the middle and downstream portions of the Huai River Plain in China using different HFUs for river networks and lakes. The simulation results showed great consistency with the observed data, which proves that DF-RMS is a reliable system to simulate the flow movement in river networks and lakes.
Highlights
Floods are extreme phenomena that need to be accurately assessed for the protection of mankind’s activities
We focused on the basic theories and concepts of hydraulic modeling in the distributed-framework basin modeling system (DFBMS)
The numerical procedures that distributed-framework river modeling system (DF-RMS) uses to model the hydraulic processes in runoff concentration, flow movement in river networks, and lakes are discussed in detail in this paper
Summary
Floods are extreme phenomena that need to be accurately assessed for the protection of mankind’s activities. Mathematical tools focused on hydraulic simulations are designated as the most holistic approach to describe/simulate flood events and determine flood hazards [1]. We focused on the basic theories and concepts of hydraulic modeling in the distributed-framework basin modeling system (DFBMS). The runoff concentration and routing model based on DEM is an essential component of the DFBMS [5,6], which was introduced in the second paper in this series. We introduce another professional model system of DFBMS [7,8,9]: distributed-framework river modeling system (DF-RMS). The DF-RMS models the hydraulics of runoff movement through rivers, lakes, reservoirs, and hydraulic engineering structures using a one-dimensional or two-dimensional approach [10]. Based on the concept of a hydrological feature unit (HFU)
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