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__________________________ SITES 2005.1.4 INTEGRATED DEVELOPMENT ENVIRONMENT for WATER RESOURCE SITE...

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__________________________ __________________________ SITES 2005.1.4 SITES 2005.1.4 INTEGRATED DEVELOPMENT ENVIRONMENT INTEGRATED DEVELOPMENT ENVIRONMENT for WATER RESOURCE SITE ANALYSIS COMPLEX WATERSHEDS COMPLEX WATERSHEDS SITES IN SERIES SITES IN SERIES
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Page 1: __________________________ SITES 2005.1.4 INTEGRATED DEVELOPMENT ENVIRONMENT for WATER RESOURCE SITE ANALYSIS COMPLEX WATERSHEDS SITES IN SERIES.

____________________________________________________SITES 2005.1.4SITES 2005.1.4

INTEGRATED DEVELOPMENT ENVIRONMENTINTEGRATED DEVELOPMENT ENVIRONMENTfor

WATER RESOURCE SITE ANALYSIS

COMPLEX WATERSHEDSCOMPLEX WATERSHEDSSITES IN SERIESSITES IN SERIES

Page 2: __________________________ SITES 2005.1.4 INTEGRATED DEVELOPMENT ENVIRONMENT for WATER RESOURCE SITE ANALYSIS COMPLEX WATERSHEDS SITES IN SERIES.

OBJECTIVES

• Understand concepts related to dam design with complex watersheds

• Discuss stream reach routing options

Page 3: __________________________ SITES 2005.1.4 INTEGRATED DEVELOPMENT ENVIRONMENT for WATER RESOURCE SITE ANALYSIS COMPLEX WATERSHEDS SITES IN SERIES.

UPPER

LOWER

Page 4: __________________________ SITES 2005.1.4 INTEGRATED DEVELOPMENT ENVIRONMENT for WATER RESOURCE SITE ANALYSIS COMPLEX WATERSHEDS SITES IN SERIES.

UPPER

LOWER

Page 5: __________________________ SITES 2005.1.4 INTEGRATED DEVELOPMENT ENVIRONMENT for WATER RESOURCE SITE ANALYSIS COMPLEX WATERSHEDS SITES IN SERIES.

Dams in Series

• Policy - Dams in series are to be given special consideration (NEM-210 520.24)

• NEM-210 520.27(b)(2)(i) breach considerations.

Page 6: __________________________ SITES 2005.1.4 INTEGRATED DEVELOPMENT ENVIRONMENT for WATER RESOURCE SITE ANALYSIS COMPLEX WATERSHEDS SITES IN SERIES.

Upper DamUpper Dam• Hydrologic criteria and procedures (TR-60)

– same as or more conservative than those for downstream dams - if failure of the upper dam could contribute to the failure of the lower dam

– If routing through an upper dam and it is overtopped it is to be considered breached.

– Dam breach criteria TR -60 p 1-1

Page 7: __________________________ SITES 2005.1.4 INTEGRATED DEVELOPMENT ENVIRONMENT for WATER RESOURCE SITE ANALYSIS COMPLEX WATERSHEDS SITES IN SERIES.

Complex WatershedsComplex Watersheds

• Hydrologically homogeneous W/S

• Soil and Cover

• Size

Page 8: __________________________ SITES 2005.1.4 INTEGRATED DEVELOPMENT ENVIRONMENT for WATER RESOURCE SITE ANALYSIS COMPLEX WATERSHEDS SITES IN SERIES.

Complex WatershedsComplex Watersheds

• Drainage areas above 25 square miles should be subdivided.

• Goal - Hydrologically Homogeneous Areas

• Drainage areas more than 10 square miles should be considered for subdivision.

Page 9: __________________________ SITES 2005.1.4 INTEGRATED DEVELOPMENT ENVIRONMENT for WATER RESOURCE SITE ANALYSIS COMPLEX WATERSHEDS SITES IN SERIES.

Upstream SiteUpstream Site

• Homogeneous or Subdivided -- assumed to be in place for the design of the lower site.

• Site is routed only

• Spillway materials data not required.

• Minimum data can be included in structure table.

Page 10: __________________________ SITES 2005.1.4 INTEGRATED DEVELOPMENT ENVIRONMENT for WATER RESOURCE SITE ANALYSIS COMPLEX WATERSHEDS SITES IN SERIES.

Downstream SiteDownstream Site

• Site to be designed.

• If Integrity analysis is required - then all data is required.

Page 11: __________________________ SITES 2005.1.4 INTEGRATED DEVELOPMENT ENVIRONMENT for WATER RESOURCE SITE ANALYSIS COMPLEX WATERSHEDS SITES IN SERIES.

Sites in SeriesSites in Series

Upper DamUpper Dam

Reach

Lower Dam

The upper The upper dam is dam is considered a considered a feature of the feature of the watershed for watershed for the design of the design of the lower the lower dam.dam.

Page 12: __________________________ SITES 2005.1.4 INTEGRATED DEVELOPMENT ENVIRONMENT for WATER RESOURCE SITE ANALYSIS COMPLEX WATERSHEDS SITES IN SERIES.

Lower DamLower Dam

• Hydrographs from upper controlled areas are based on same criteria as for lower dam.

• Flows are routed through spillways of all upper dams and channel reaches to the lower dam where they are combined with the hydrographs from any uncontrolled drainage area. The combined hydrographs are used to flood route the lower dam.

Page 13: __________________________ SITES 2005.1.4 INTEGRATED DEVELOPMENT ENVIRONMENT for WATER RESOURCE SITE ANALYSIS COMPLEX WATERSHEDS SITES IN SERIES.

W/S DATAW/S DATA

• The hydrologic characteristics of the uncontrolled area or subarea are to be used to develop all of the required input data for the area or subarea.

• This data includes - DA, Tc, CN, stage-storage, sediment, hazard class, rainfall, Ci, Baseflow, etc.

Page 14: __________________________ SITES 2005.1.4 INTEGRATED DEVELOPMENT ENVIRONMENT for WATER RESOURCE SITE ANALYSIS COMPLEX WATERSHEDS SITES IN SERIES.

Stream Reach Routing Options

Page 15: __________________________ SITES 2005.1.4 INTEGRATED DEVELOPMENT ENVIRONMENT for WATER RESOURCE SITE ANALYSIS COMPLEX WATERSHEDS SITES IN SERIES.

Reach LengthReach Length

• The length of channel through which a hydrograph will be routed.

• In most cases the distance downstream from the outlet of the upstream site to the most upstream normal pool elevation of the dam downstream.

Page 16: __________________________ SITES 2005.1.4 INTEGRATED DEVELOPMENT ENVIRONMENT for WATER RESOURCE SITE ANALYSIS COMPLEX WATERSHEDS SITES IN SERIES.

Reach 1Reach 1

Reach 2Reach 2

Upper DamUpper Dam

Lower DamLower Dam

This is an example of a reach routing where the characteristics of the channel were not the same for the whole reach. So two reaches have been used to represent the channel.

Page 17: __________________________ SITES 2005.1.4 INTEGRATED DEVELOPMENT ENVIRONMENT for WATER RESOURCE SITE ANALYSIS COMPLEX WATERSHEDS SITES IN SERIES.

Cross Section Rating CurveCross Section Rating Curve

• The shape of the cross section with possible multiple roughness values gives stage, area, and discharge that is used to define how the hydrograph will be routed downstream.

Page 18: __________________________ SITES 2005.1.4 INTEGRATED DEVELOPMENT ENVIRONMENT for WATER RESOURCE SITE ANALYSIS COMPLEX WATERSHEDS SITES IN SERIES.

Example of a subdivided cross Example of a subdivided cross section - note areas of multiple section - note areas of multiple roughness shown in the sections.roughness shown in the sections.

7

8

Page 19: __________________________ SITES 2005.1.4 INTEGRATED DEVELOPMENT ENVIRONMENT for WATER RESOURCE SITE ANALYSIS COMPLEX WATERSHEDS SITES IN SERIES.

Muskingum-Cunge Reach Routing In SITES

Page 20: __________________________ SITES 2005.1.4 INTEGRATED DEVELOPMENT ENVIRONMENT for WATER RESOURCE SITE ANALYSIS COMPLEX WATERSHEDS SITES IN SERIES.

Reach Cross Section Rating Table

• Data derived from HECRAS, Manning’s, etc.

• Reach Length = 5400 feet, Bankfull Elevation = 2422.5

ElevationDischarge

(cfs)End Area

(ft2)Top

Width (ft)Friction

Slope (ft/ft)

2410.0 0 0 0 0.00502411.4 25 19 23 0.00382412.3 50 41 31 0.00182413.4 100 81 42 0.00112415.1 250 170 60 0.00082416.9 500 296 78 0.00072418.2 750 404 90 0.00072419.3 1000 502 100 0.00082420.1 1250 592 109 0.00082420.9 1500 677 116 0.00082421.5 1750 755 123 0.00092422.1 2000 843 193 0.00092423.1 2500 1112 369 0.00102423.9 3000 1751 1440 0.00102424.4 3500 2739 1935 0.00082425.0 4000 3844 1994 0.0007

Page 21: __________________________ SITES 2005.1.4 INTEGRATED DEVELOPMENT ENVIRONMENT for WATER RESOURCE SITE ANALYSIS COMPLEX WATERSHEDS SITES IN SERIES.
Page 22: __________________________ SITES 2005.1.4 INTEGRATED DEVELOPMENT ENVIRONMENT for WATER RESOURCE SITE ANALYSIS COMPLEX WATERSHEDS SITES IN SERIES.

Rating TableRating Table

Page 23: __________________________ SITES 2005.1.4 INTEGRATED DEVELOPMENT ENVIRONMENT for WATER RESOURCE SITE ANALYSIS COMPLEX WATERSHEDS SITES IN SERIES.

Fig 17-13 Convex routing Fig 17-13 Convex routing coefficient versus velocitycoefficient versus velocity

Page 24: __________________________ SITES 2005.1.4 INTEGRATED DEVELOPMENT ENVIRONMENT for WATER RESOURCE SITE ANALYSIS COMPLEX WATERSHEDS SITES IN SERIES.
Page 25: __________________________ SITES 2005.1.4 INTEGRATED DEVELOPMENT ENVIRONMENT for WATER RESOURCE SITE ANALYSIS COMPLEX WATERSHEDS SITES IN SERIES.

Taken from App. H in TR-20

Page 26: __________________________ SITES 2005.1.4 INTEGRATED DEVELOPMENT ENVIRONMENT for WATER RESOURCE SITE ANALYSIS COMPLEX WATERSHEDS SITES IN SERIES.
Page 27: __________________________ SITES 2005.1.4 INTEGRATED DEVELOPMENT ENVIRONMENT for WATER RESOURCE SITE ANALYSIS COMPLEX WATERSHEDS SITES IN SERIES.

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