Table of Contents

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Part I: VFSMOD-W: Model Documentation

1. Introduction

2. VFSMOD: Model Components, Processes and Solution Techniques

2.1 Hydrology

2.2 Sediment Transport

2.3 Linkage between submodels

2.4 Solution procedure

2.5 Model inputs

3. UH utility - preparation of model inputs for design purposes

3.1 Generation of Synthetic Rainfall Hyetographs

3.2 Generation of Runoff Hydrographs

3.3 Incoming sediment load calculation

3.4 Computational Structure of UH

3.5 Sensitivity Analysis of VFSMOD.

3.6 Previous Testing and Applications

4. Sensitivity and Uncertainty Analysis Procedures for UH and VFSMOD Built In VFSMOD-W

5. Design Procedure

6. Potential Users and Applications of the Modelling System

7. Known Limitations and Applicability of the Models

7.1 Known Limitations of the Model

7.2 Future Research

8. Distribution and Training

9. Acknowledgments

10. References

Part II: VFSMOD and UH: User's Manual

1. VFSMOD user's manual

1.1 Obtaining VFSMOD

1.2 Installing and running VFSMOD

1.3 Using the project file for input and output

1.4 VFSMOD input files

1.5 Model file outputs

1.6 Tips for running the model

1.7 Sample application

2. UH for Input Preparation: User's Manual

2.1 Installing and running UH

2.2 Using the project file for input and output

2.3 UH input files

2.4 Sample application

Part III: VFSMOD-W: User's Manual

1. Installation Information

2. Using VFSMOD

3. Main Window

3.1 vfsmod-w Options File

4. UH Project Window

4.1 UH Input File Editing

5. VFS Project Window

5.1 Overland Flow Inputs (ikw)

5.2 VFS Infiltration Soil Properties (iso)

5.3 VFS Buffer Vegetation Characteristics (igr)

5.4 Incoming Sediment Characteristics (isd)

5.5 Storm Hyetograph (irn)

5.6 VFS Source Area Storm Runoff (iro)

6. Processing and Analysis of VFSMOD Results

7. Using the Plot Windows

8. Sensitivity Analysis Screens

9. Uncertainty Analysis Screens

10. Design Screen

11. Troubleshooting vfsmod-w

12. VFSMOD-W Change History

Part IV: VFSMOD: Appendices

1. APPENDIX 1: Description of the model subroutines

1.1 Program VFSMOD

1.2 FINPUT(LISFIL)

1.3 INI(A,B,X,XM,X0,Q0,QM,SSE,NODEX)

1.4 GRASSIN(ICOARSE,COARSE,LISFIL)

1.5 INPUTS(N,NBAND,NRAIN,RAIN,NBCROFF,BCROFF,TE,QMAX,VL, FWIDTH,PGPAR,VKS,NCHK,LISFIL)

1.6 QUAD

1.7 FORMA(A,NBAND,PGPAR)

1.8 ELEM(EK,PGPAR)

1.9 SHAPE(XIS,PSI,DPSI,WF,PGPAR)

1.10 ASSM(A,EK,NBAND,NEL)

1.11 BCA(A,NBAND)

1.12 FACTOR (A,N,NBAND)

1.13 GASUB(TIME,DT,L,R,RAIN,NEND,TRAI)

1.14 FORMB(B0,X0,Q0,N,BCRO,PGPAR)

1.15 MODIFY(QM,B,BCRO,PGPAR)

1.16 SOLVE(A,B,X,N,NBAND)

1.17 CONVER(N,X,XM,MFLAG)

1.18 UPDATE(N,X,X0)

1.19 FLOW(N,XT,QT)

1.20 GRASSED(TIME,N,QIN,NODEX,ICOARSE, COARSE)

1.21 OCF(NPLACE)

1.22 EINSTEIN(GS2,NTRCAP,COARSE)

1.23 STEP3(GS2,TIME,NTRCAP,COARSE)

1.24 POINTS(N,XPOINTS,NODEX,VBT)

1.25 KWWRITE(N,L,M,QTEMP,X,BCRO,FWIDTH)

1.26 OUTMASS(VL,FWIDTH,TRAI,LISFIL)

2. APPENDIX 2: Model parameters and variables

2.1 Overland flow

2.2 Infiltration

2.3 Sediment transport

3. APPENDIX 3: Soils and Vegetation data

3.1 Soils data (Green-Ampt parameters)

3.2 Manning's roughness coeficient, n

3.3 Vegetation types for VFS's

3.4 NRCS (SCS) Curve Numbers

3.5 MUSLE Crop factor C

3.6 Contour factor (P) values for MUSLE equation in UH

3.7 References for Soils and Vegetation data