Review of Ordinary High Water Mark Indicators for Delineating Arid Streams in the Southwestern United States Chapter 1. Introduction and Summary of Ordinary High Water Mark IndicatorsPROJECT BACKGROUND-continueOVERVIEW OF THE CONCEPT OF "WATERS OF THE UNITED STATES" GENERAL APPROACH TO THE IDENTIFICATION OF OHWM INDICATORSPROJECT AREALANDSCAPE FEATURES AND THEIR USEFULNESS AS OHWM INDICATORSGeomorphologyVegetation - ERDC-TR-04-10018Vegetation-continue - ERDC-TR-04-10019WORKING DEFINITION: OHW IN THE ARID SOUTHWESTSYNTHESIS OF OHWM FEATURESSYNTHESIS OF OHWM FEATURES-continueTable 1. Potential OHWM indicators for testing and evaluationREFERENCES - ERDC-TR-04-10024REFERENCES-continue - ERDC-TR-04-10025REFERENCES-continue - ERDC-TR-04-10026Chapter 2. Hydrology Literature Review for Ordinary High Water Mark Delineation in the Arid SouthwestHYDROLOGYFigure 3. Average annual precipitation in the western U.S. for 19611990, showing the extreme variability in rainfall in the SouthwestMeteorological Sources of MoistureTable 3. Summary of annual and monthly average depths of precipitationFigure 5. Positions of the North Pacific high pressure ridge and atmospheric cirulation patternsConvective ThunderstormsFigure 6. Positions of the North Pacific High and Bermuda HighInfluence of El NioFactors Controlling RunoffFigure 8. Soils map of the United StatesIllustration - ERDC-TR-04-10038Transmission lossesValue and Limitations of Existing Maps for Understanding Runoff PatternsTable 4. Precipitation and runoff characteristics for ecosystem provinces in the western U.SRainfallRunoff ModelsRainfallRunoff Models-continue - ERDC-TR-04-10043RainfallRunoff Models-continue - ERDC-TR-04-10044Table 5. Rainfallrunoff models accepted by FEMA for usage in the National Flood Insurance ProgramHYDRAULICSInfluence of Boundary ConditionsHydraulic ModelsUsefulness of Hydrology and Hydraulics for Delineating the OHWMTable 6. Hydraulic models accepted by FEMA for usage in the National Flood Insurance ProgramComparisons of hydraulic model CONCLUSIONS - ERDC-TR-04-10052REFERENCES - ERDC-TR-04-10053REFERENCES-continue - ERDC-TR-04-10054REFERENCES-continue - ERDC-TR-04-10055REFERENCES-continue - ERDC-TR-04-10056REFERENCES-continue - ERDC-TR-04-10057Chapter 3. Fluvial Geomorphology Literature Review for Ordinary High Water Mark Indicators in the Arid Southwest INTRODUCTION-continue - ERDC-TR-04-10059PRINCIPLES OF FLUVIAL GEOMORPHOLOGYTerrace DevelopmentTerrace Development-continueSTREAM SYSTEM TYPESFigure 13. Wide, shallow ephemeral stream channelFigure 14. Unconfined sheetflood zone on Wild Burro Wash near Marana, ArizonaThe morphological changesFigure 15. Arroyo Chico in the Rio Puerco Watershed, New Mexico, showing entrenched vertical walls typical of arroyosCompound ChannelsFigure 16. Compound channel showing a single-thread meandering channel inset into a wider braided patternAlluvial FansFigure 17. Conical shape and distributary flow pattern developed on an alluvial fanFigure 18. Aerial photographs of Ruelas Fan near Marana, Arizona, taken in 1936 and 1988Figure 19. Five channel morphologies observed on alluvial fans in southern ArizonaFigure 20. Geomorphic map of alluvial fan surfaces on the southwestern piedmont of the White Tank Mountains, ArizonaFigure 21. Well-developed weathering features on an inactive alluvial fan surfaceAnastomosing RiversFigure 22. Anastomosing channels along Cooper Creek, AustraliaSingle-Thread Channels with Adjacent FloodplainsDIFFERENCES AMONG STREAM TYPESDIFFERENCES AMONG STREAM TYPES-continue - ERDC-TR-04-10080DIFFERENCES AMONG STREAM TYPES-continue - ERDC-TR-04-10081IDENTIFYING THE ORDINARY HIGH WATER MARK ON DESERT RIVERSIdentification of Limits of Geomorphically Effective EventsExclusion of Areas Definitively Above and Below the OHWMExclusion of Areas Definitively Above and Below the OHWM-continueRecognition of the Transitory Tendency of Arid-Region RiversApplication of Hydrologic and Hydraulic MethodsApplication of Hydrologic and Hydraulic Methods-continueCONCLUSIONS - ERDC-TR-04-10089REFERENCES - ERDC-TR-04-10090REFERENCES-continue - ERDC-TR-04-10091REFERENCES-continue - ERDC-TR-04-10092REFERENCES-continue - ERDC-TR-04-10093REFERENCES-continue - ERDC-TR-04-10094REFERENCES-continue - ERDC-TR-04-10095REFERENCES-continue - ERDC-TR-04-10096REFERENCES-continue - ERDC-TR-04-10097REFERENCES-continue - ERDC-TR-04-10098REFERENCES-continue - ERDC-TR-04-10099GLOSSARY - ERDC-TR-04-10100GLOSSARY-continue - ERDC-TR-04-10101Chapter 4. Vegetation Literature Review for Ordinary High Water Mark Indicators in the Arid Southwest INTRODUCTION-continue - ERDC-TR-04-10103COMMUNITY-LEVEL PATTERNSTable 12. Wetland biotic communities of the southwestern U.S. and northwestern MexicoCOMMUNITY-LEVEL PATTERNS-continue - ERDC-TR-04-10106COMMUNITY-LEVEL PATTERNS-continue - ERDC-TR-04-10107SPATIAL PATTERNSSPATIAL PATTERNS-continueADAPTATIONS OF WOODY PIONEER SPECIESFluvial Processes and Tree RecruitmentGrowth and SurvivalGrowth and Survival-continuePOPULATION PATTERNS OF PIONEER TREESFigure 24. Hydromesic riparian vegetation at a perennial site on the San Pedro River, ArizonaPOPULATION PATTERNS OF PIONEER TREES-continue - ERDC-TR-04-10116POPULATION PATTERNS OF PIONEER TREES-continue - ERDC-TR-04-10117HERBACEOUS PLANT PATTERNSHERBACEOUS PLANT PATTERNS-continueFigure 25. Mesoriparian vegetation at an intermittent site on the San Pedro River, ArizonaXERORIPARIAN SYSTEMSXERORIPARIAN SYSTEMS-continueINDIVIDUAL RESPONSEIDENTIFYING THE ORDINARY HIGH WATER MARK: SUMMARY AND SYNTHESISTable 13. Potential vegetative evidence of location below the ordinary high water markTable 14. Possible vegetative evidence of location above the ordinary high water markIDENTIFYING THE ORDINARY HIGH WATER MARK: SUMMARY AND SYNTHESIS-continueCONCLUSION - ERDC-TR-04-10128REFERENCES - ERDC-TR-04-10129REFERENCES-continue - ERDC-TR-04-10130REFERENCES-continue - ERDC-TR-04-10131REFERENCES-continue - ERDC-TR-04-10132REFERENCES-continue - ERDC-TR-04-10133REFERENCES-continue - ERDC-TR-04-10134REFERENCES-continue - ERDC-TR-04-10135REFERENCES-continue - ERDC-TR-04-10136REFERENCES-continue - ERDC-TR-04-10137Report Documentation Page - ERDC-TR-04-10138ERDC-TR-04-1