Water Resources Engineering Hydrological Analysis and Simulation Model HEC-HMS Prof. Ke-Sheng Cheng Department of Bioenvironmental Systems Engineering National Taiwan University

Introduction Hydrological analysis and simulation generally involve many components including precipitation, infiltration, rainfall-runoff transformation, reservoir routing, channel routing, design of water conveyance or detention structures, etc. Hydrological and hydraulic analyses (H&H analyses) Computer models capable of handling all these tasks in one run are very helpful in engineering design and assessment of possible alternatives. 12/4/2018 Lab for Remote Sensing Hydrology and Spatial Modeling, Dept. of Bioenvironmental Systems Eng., NTU

Many hydrological models have been developed. HEC-HMS, HEC-RAS SWMM HSPF SOBEK MIKE 12/4/2018 Lab for Remote Sensing Hydrology and Spatial Modeling, Dept. of Bioenvironmental Systems Eng., NTU

HEC-HMS Developed and distributed by the US Army Corps of Engineering. Free download is available. HMS is a project-based hydrologic modeling system. A project is composed of several components Basin model component Meteorological model component Control specifications component Input data component 12/4/2018 Lab for Remote Sensing Hydrology and Spatial Modeling, Dept. of Bioenvironmental Systems Eng., NTU

User Interface Watershed Explorer Desktop Component Editor Message Log 12/4/2018 Lab for Remote Sensing Hydrology and Spatial Modeling, Dept. of Bioenvironmental Systems Eng., NTU

HMS model components A simulation run calculates the rainfall-runoff response in the basin model given rainfall input from the meteorological model. The control specifications component define the time period and time step of the simulation run. The input data component provides auxiliary data that are required for the simulation run including Time series of hyetograph Stage-storage-discharge relationship 12/4/2018 Lab for Remote Sensing Hydrology and Spatial Modeling, Dept. of Bioenvironmental Systems Eng., NTU

The Runoff Process 12/4/2018 Lab for Remote Sensing Hydrology and Spatial Modeling, Dept. of Bioenvironmental Systems Eng., NTU

12/4/2018 Lab for Remote Sensing Hydrology and Spatial Modeling, Dept. of Bioenvironmental Systems Eng., NTU

12/4/2018 Lab for Remote Sensing Hydrology and Spatial Modeling, Dept. of Bioenvironmental Systems Eng., NTU

12/4/2018 Lab for Remote Sensing Hydrology and Spatial Modeling, Dept. of Bioenvironmental Systems Eng., NTU

12/4/2018 Lab for Remote Sensing Hydrology and Spatial Modeling, Dept. of Bioenvironmental Systems Eng., NTU

12/4/2018 Lab for Remote Sensing Hydrology and Spatial Modeling, Dept. of Bioenvironmental Systems Eng., NTU

12/4/2018 Lab for Remote Sensing Hydrology and Spatial Modeling, Dept. of Bioenvironmental Systems Eng., NTU

Basin model component Basin model component defines hydrological elements that form the watershed drainage network and types of hydrological analysis that need to be conducted in a simulation run. Hydrological elements Subbasin Reach Junction Reservoir Diversion Sink Source 12/4/2018 Lab for Remote Sensing Hydrology and Spatial Modeling, Dept. of Bioenvironmental Systems Eng., NTU

Starting HEC-HMS 12/4/2018 Lab for Remote Sensing Hydrology and Spatial Modeling, Dept. of Bioenvironmental Systems Eng., NTU

Create a new project or open an existing project 12/4/2018 Lab for Remote Sensing Hydrology and Spatial Modeling, Dept. of Bioenvironmental Systems Eng., NTU

The same watershed can be modeled by different Basin models to assess the effect of different hydrological modeling approaches. Create a Basin Model 12/4/2018 Lab for Remote Sensing Hydrology and Spatial Modeling, Dept. of Bioenvironmental Systems Eng., NTU

Adding hydrological elements to Basin 1. A subbasin cannot be connected to downstream point without a downstream element (junction or reach). 12/4/2018 Lab for Remote Sensing Hydrology and Spatial Modeling, Dept. of Bioenvironmental Systems Eng., NTU

Create a meteorological model 12/4/2018 Lab for Remote Sensing Hydrology and Spatial Modeling, Dept. of Bioenvironmental Systems Eng., NTU

Create Control Specifications 12/4/2018 Lab for Remote Sensing Hydrology and Spatial Modeling, Dept. of Bioenvironmental Systems Eng., NTU

Create and compute a simulation run 12/4/2018 Lab for Remote Sensing Hydrology and Spatial Modeling, Dept. of Bioenvironmental Systems Eng., NTU

Check simulation results Culverts diameter=1m 12/4/2018 Lab for Remote Sensing Hydrology and Spatial Modeling, Dept. of Bioenvironmental Systems Eng., NTU

Culverts diameter=3m 12/4/2018 Lab for Remote Sensing Hydrology and Spatial Modeling, Dept. of Bioenvironmental Systems Eng., NTU

12/4/2018 Lab for Remote Sensing Hydrology and Spatial Modeling, Dept. of Bioenvironmental Systems Eng., NTU

Whippany Landfill Closure Plan Drainage design Pre-development 12/4/2018 Lab for Remote Sensing Hydrology and Spatial Modeling, Dept. of Bioenvironmental Systems Eng., NTU

Pre-development 12/4/2018 Lab for Remote Sensing Hydrology and Spatial Modeling, Dept. of Bioenvironmental Systems Eng., NTU

Post-development 12/4/2018 Lab for Remote Sensing Hydrology and Spatial Modeling, Dept. of Bioenvironmental Systems Eng., NTU

Post-development 12/4/2018 Lab for Remote Sensing Hydrology and Spatial Modeling, Dept. of Bioenvironmental Systems Eng., NTU

Practical drainage design necessitates detailed hydrological modeling and simulation. Sizing the drop flume Designing the peripheral ditch Grading and storage routing in front of the entrance to drop flumes Hydraulic jump calculation at the D/S end of drop flumes (side protection for the peripheral ditch) 12/4/2018 Lab for Remote Sensing Hydrology and Spatial Modeling, Dept. of Bioenvironmental Systems Eng., NTU

赤蘭溪水文分析與模擬 12/4/2018 Lab for Remote Sensing Hydrology and Spatial Modeling, Dept. of Bioenvironmental Systems Eng., NTU

12/4/2018 Lab for Remote Sensing Hydrology and Spatial Modeling, Dept. of Bioenvironmental Systems Eng., NTU

12/4/2018 Lab for Remote Sensing Hydrology and Spatial Modeling, Dept. of Bioenvironmental Systems Eng., NTU

赤蘭溪雨量站劃分 12/4/2018 Lab for Remote Sensing Hydrology and Spatial Modeling, Dept. of Bioenvironmental Systems Eng., NTU

澐水溪雨量站劃分 12/4/2018 Lab for Remote Sensing Hydrology and Spatial Modeling, Dept. of Bioenvironmental Systems Eng., NTU

石弄溪雨量站劃分 12/4/2018 Lab for Remote Sensing Hydrology and Spatial Modeling, Dept. of Bioenvironmental Systems Eng., NTU

12/4/2018 Lab for Remote Sensing Hydrology and Spatial Modeling, Dept. of Bioenvironmental Systems Eng., NTU

12/4/2018 Lab for Remote Sensing Hydrology and Spatial Modeling, Dept. of Bioenvironmental Systems Eng., NTU

12/4/2018 Lab for Remote Sensing Hydrology and Spatial Modeling, Dept. of Bioenvironmental Systems Eng., NTU

12/4/2018 Lab for Remote Sensing Hydrology and Spatial Modeling, Dept. of Bioenvironmental Systems Eng., NTU