Laserfiche WebLink
NOTE: THIS IS A REPRODUCTION OF TABLE 1, APPENDIX A. <br />"DESIGN CHARTS FOR OPEN CHANNEL FW', (HDS # <br />19. Open channels, lined I (straight alinement): I <br />A. Concrete, with surfaces as indicated: <br />1. Formed, no ftiab ------------------------------------ 0.013-0.017 <br />2. Trowel finish ----------------------------------------- 0.012-0.014 <br />3. Float finish ------------------------------------------ 0-013-4.016 <br />4. Float finish, some gravel an bottom --- --- -- - - - - -- 0.015-0.017 <br />5. Ounite, good section ------------ ------ --- --- ---_---- 0.016-0-019 <br />6. Ounite, wavy section -------------------------------- 0.018-4-022 <br />B. Concrete, bottom float finished, sides as indicated: <br />1. Dressed stone In mortar ------- ----- ---- ---------- ---- 0.0154.017 <br />2. Random stone In mortar __------- ------ ------- ------ 0.017 -0. <br />3. Cement rubble masonry _____________ ______________ __ 0. 020-0. = <br />4. Cement rubble masonry. plastered ------ ------ 0.016-0.020 <br />5. Dry rubble (riprap) ---------------------------------- 0. 020-0.030 <br />C. Gravel bottom, sides as indicated: <br />1. Formed concrete _________________________ ---__ -. 0-017-0.02D <br />2. Random stone In mort ar __________________ _____ ______ 0. 020- 0.02 <br />3. Dry rubble (riprap) ---------------------------------- 0.023-0.033 <br />D. Br - ---- ------- --------- ---- - ------ -- -- 0.0144.017 <br />E. Asphalt: <br />1 . Smooth ---------------------------------------- - - - - -- 0.013 <br />1 Rou g h -------- ------ ------------ -- ----------- --- ---_ 0.016 <br />F . Wood planed clean- --- -- -- ---.-- __---- ------------ 0.011-0.013 <br />G. Concrete -line ---------------- <br />1. Good section ----------------------------------------- 0. 017-0. OM <br />2. Irregular section -------------------------------------- 0.0220-027 <br />113. Open etannela. excavated 4 (straight alinement.$ natural <br />lining): <br />A. Eartb, uniform section: <br />I. Clean, recently completed __ _______ ____ _____ ___ __ _ ____ 0.016-0.018 <br />2. -Clean, after weathering ______ ________________________ 0.018-0.02D <br />3. With abort gram, few weeds _______________________ 0.022-0.027 <br />4. In gravelly soli, uniform section, clean ---------- ---- -- 0. OM-0. 025 <br />B. Earth, fairly uniform section: <br />1. No vegetation ------------- ---- -- -- -----_-._-_ 0.022-0.025 <br />2. Gram, some weeds ----------------------------- - - - - -- 0. 025-0. 030 <br />3. Dense weeds or aquatic plants in deep channels - -___- 0.030-0.035 <br />4. Sides clean, gravel bottom -------------- --------- - ---- 0. 025-C 030 <br />5. Sides clean, cobble bottom -------- ------- -- --- ---- --- 0.030-0.040 <br />C. Dragline excavated or dredged: <br />1. No veget ation ----------- ----- --- ---------------- --- -- 0. 028-0. 033 <br />2. Light brush on banks ______________________________ _ 0.035-0.050 <br />D. Rock: <br />1. Based on design section _______ __ _____________________ 0.035 <br />2. Based on actual mean section: <br />a. Smooth and uniform ------------------------------ 0.036-0.040 <br />b. Jagged and Irregular ------------------------------- 0.040-0.045 <br />E. Channels not maintained, weeds and brush uncut: <br />1. Dense weeds, high as flow depth ------ ----- ------ ---- 0. 0". 12 <br />2. Clean bottom, brush an aides _________ ______________ 0. ". 06 <br />3 Clean bottom brush on sides, highest stage of flow 0. 07-0. 11 <br />4: Dense brush, �i b stage ---- ------------------------ -- 0.10-0.14 <br />F-4 <br />IV. Higbway ekannets and 9WAISO with onsixtolond vegetation 6 T <br />glues shown we for velocities of 2 and 6 f.ps.): <br />A. D of Row up to 0.7 foot: <br />.7 1. M K atacky bluegrass, buffalograw. <br />w 02 .= -------------------------------- <br />b. Length 4-6 inches --------------------------------- <br />2. Good stand, any gram: <br />a. Length about 12 inches --------------------------- <br />b. Length about 24 inches - ---------- -------- --- - -- --- <br />3. Fab stand, any gram: <br />a. Length about 12 Inches ---------------------------- <br />b. Length about 24 inches --------------------------- <br />B. De tb of flow 0.7-1.5 <br />1. B ermudagrass, Kentucky bluegrass, buflalograss: <br />IL Moweedd to 2 <br />b. Length 4 to 6 Inches ------------------------------- <br />2. Good stand, any grass: <br />s. Length about 12 inches __ ___ __ ________ _____ __ __ ____ <br />b. Length about 24 inches ---------------------------- <br />3. Fair stand, any gram: <br />s. Length about 12 inches ____________________________ <br />b. Length about 24 inches ------- ---- ----- ---- -------- <br />Mann 'a <br />a range 2 <br />0.07-0.045 <br />0.09-0.05 <br />0. 1". 09 <br />0.304.15 <br />0.14-0.08 <br />0.25--0.13 <br />0.05 <br />0. 06-0. Ot <br />0.12-0.07 <br />0.20-0. 10 <br />0.10-0.05 <br />0.17-0.09 <br />V_ Street an expre <br />A. Concrete gutter, troweled finish ---------- --------- ---- -- <br />B. Asphalt pavement: <br />1. smooth texture -------------------------------------- <br />2. Rough texture -------------------------------------- <br />C. Concrete gutter with asphalt pavement: <br />1. smooth ---------------------------------------------- I Rough ----------------------------------------------- <br />D. Concrete pavement: <br />1. Float " nigh ----------- ---- ------ ------- ----- -- -- - - --- <br />2. Broom finish ----------------------------------------- <br />E. For gutters with small slope, where sediment may accu- <br />mulate, Increase above values of " by_________________ <br />VL Natural ob"m channdn: <br />A. Minor sta as- I (surface width at flood stage less than 100 <br />ft.): <br />1. Fairly regular section: <br />a. Some grass and weeds, little or no brush ._.___ - -__ <br />b. Dense growth of weeds, depth of flow materially <br />weed height ----- __ <br />C. <br />greater than light brush on banks _________________ <br />d. some weeds, heavy brush on banks ---------- ----- <br />e. Some weeds, dense willows on bents ____ -.___ <br />L For trees within channel, with branches submerged <br />at high stage, increase all above values by_.__ -__ <br />2. Irregular sections, with pools, slight channel meander; <br />increase values given In Is-e about ________ <br />3. Mountain streams no vegetation In channel, banks <br />usually steep, trees and brush along banks sub- <br />merged at high stage: <br />a Bottom of gravel, cobbles, and few boulders - -. - -_ <br />b. Bottom of cobbles, with large boulders ------------ <br />B. Flood plains (adjacent to natural streams): <br />-1. Pasture, no brush: <br />a. Short grass ---------------------------------------- <br />b. High grass ---------------------------------------- 2- Cultivated areas: <br />a. No crop ------------------------------------------- b. Mature row crops ------------------------------- <br />c. Mature field crops ------------------------------ <br />3 Heavy weeds, scattered brush ________________ ____ __ __ <br />4: Light brush and trees: 10 <br />s . Winter - ------------------------------------------ <br />b. -Summar ------------------------------------------ <br />S. Medium to dense brush: 10 <br />R . Winter --------------------------------------- <br />b. Summer-: --- ------------- -- --------------- <br />6. Dense willows, summer, not bent over by current -_ __ <br />7. Cleared land with tree stumps, 100-150 per acre: <br />a. N o sprouts - --- --------- ---- ---- - - - --- <br />b. With beery growth of sprouts --------------------- <br />a. Heavy stand of timber. a few down trees, little under- <br />growth: <br />a. Flood depth below branches _______ ____________ <br />b. Flood depth roaches branches ___ _________ _______ <br />C. Major streams (surface width at flood stage more than <br />im ft.): Roughness coefficient is usually less than for <br />minor streams of simila description on account of less <br />effective resistance offered by Irregular banks or vege- <br />tation on banks. Values of n may be somewhat re- <br />duced. Follow recommendation in publication cited I <br />if possible. The value of n for larger streams of most <br />regular section, with no boulders or brush, may be in the <br />rangeof ----------------------------------------------- <br />TYPICAL MANNING BASE "no VALUES <br />0.012 <br />0.013 <br />0.016 <br />0.013 <br />0.015 <br />0.014 <br />0.016 <br />0.009 <br />0.030-0.035 <br />0.035-0.05 <br />0.035--0.05 <br />0.05-0.07 <br />0.06-0.08 <br />�k <br />0. 01-0. or <br />0.01-0.02 <br />0- 04-0. 05 c7z==s <br />0.05 <br />0.030 -0.035 <br />0.035-0.05 <br />0.03--0.04 <br />0. Oary-0. 045 <br />0.04-0.06 <br />0.05.0.07 <br />0.05-0.06 <br />0. 0". 08 <br />0. 07-0. 11 <br />0.10-0.16 <br />0.15-0.20 <br />0.04-0.05 <br />a 06 -0.08 <br />0. 10-OL 12 <br />0.12--0.16 <br />0. D28-0. 033 <br />TABLE 7 - a" <br />DEC 1994 <br />Cloned condults: <br />A. Concrete pipe ------------------------------------------- <br />0-011 <br />B. Corrugated-metal pipe or pipe-arcls: <br />1. 234 by Win. corrugation (riveted pipe): <br />a- Plain or fully coated- - ---------------------------- <br />0.034 <br />b. Paved invert (range values are for 25 and 50 percent <br />of circumference paved): <br />(1) Flow full depth . -- ------------ --------- ---- - -- <br />0.021-0-018 <br />(2) Flow 0.8 depth ------------------- ------------ <br />0.021-0-016 <br />(3) Flow 0.6 depth ---------- ------ - ----- ---- -- <br />0.019-0.013 <br />2. 6 by 2In. corrugation (field bolted) __- ______ -____ <br />0.03 <br />C. V!lr!!!--d clay pipe ------- -- --- ---- ---------- -- ----- - ---- <br />0.012-4.014 <br />D. Cast-iron pipe, uncoated -------------------------------- <br />0.013 <br />E. Steel pipe ----------------- -------------- ------ ---------- <br />0. OWA 011 <br />F. Brick: --------------------------------------------------- <br />0.014-0.017 <br />O. Monolithic concrete: <br />1. Wood forms, rough ------------- <br />0.015-0017 <br />2. Wood forms. smooth ----------- <br />0.012-0-014 <br />3. steel forms ------------------------------------------- <br />0.01210.013 <br />H. Cemented rubble masonry walls: <br />1. Concrete floor and top ------------------------- ----- <br />0. 017-0. On <br />2. Natural floor ----------------------------------------- <br />0.01 <br />I. Laminated treated wood _____ _________ __ ___ ___ __________ <br />0.015-0.017 <br />J. Vitrified clay liner plates . -- __________ ____________ ______ <br />0.013 <br />19. Open channels, lined I (straight alinement): I <br />A. Concrete, with surfaces as indicated: <br />1. Formed, no ftiab ------------------------------------ 0.013-0.017 <br />2. Trowel finish ----------------------------------------- 0.012-0.014 <br />3. Float finish ------------------------------------------ 0-013-4.016 <br />4. Float finish, some gravel an bottom --- --- -- - - - - -- 0.015-0.017 <br />5. Ounite, good section ------------ ------ --- --- ---_---- 0.016-0-019 <br />6. Ounite, wavy section -------------------------------- 0.018-4-022 <br />B. Concrete, bottom float finished, sides as indicated: <br />1. Dressed stone In mortar ------- ----- ---- ---------- ---- 0.0154.017 <br />2. Random stone In mortar __------- ------ ------- ------ 0.017 -0. <br />3. Cement rubble masonry _____________ ______________ __ 0. 020-0. = <br />4. Cement rubble masonry. plastered ------ ------ 0.016-0.020 <br />5. Dry rubble (riprap) ---------------------------------- 0. 020-0.030 <br />C. Gravel bottom, sides as indicated: <br />1. Formed concrete _________________________ ---__ -. 0-017-0.02D <br />2. Random stone In mort ar __________________ _____ ______ 0. 020- 0.02 <br />3. Dry rubble (riprap) ---------------------------------- 0.023-0.033 <br />D. Br - ---- ------- --------- ---- - ------ -- -- 0.0144.017 <br />E. Asphalt: <br />1 . Smooth ---------------------------------------- - - - - -- 0.013 <br />1 Rou g h -------- ------ ------------ -- ----------- --- ---_ 0.016 <br />F . Wood planed clean- --- -- -- ---.-- __---- ------------ 0.011-0.013 <br />G. Concrete -line ---------------- <br />1. Good section ----------------------------------------- 0. 017-0. OM <br />2. Irregular section -------------------------------------- 0.0220-027 <br />113. Open etannela. excavated 4 (straight alinement.$ natural <br />lining): <br />A. Eartb, uniform section: <br />I. Clean, recently completed __ _______ ____ _____ ___ __ _ ____ 0.016-0.018 <br />2. -Clean, after weathering ______ ________________________ 0.018-0.02D <br />3. With abort gram, few weeds _______________________ 0.022-0.027 <br />4. In gravelly soli, uniform section, clean ---------- ---- -- 0. OM-0. 025 <br />B. Earth, fairly uniform section: <br />1. No vegetation ------------- ---- -- -- -----_-._-_ 0.022-0.025 <br />2. Gram, some weeds ----------------------------- - - - - -- 0. 025-0. 030 <br />3. Dense weeds or aquatic plants in deep channels - -___- 0.030-0.035 <br />4. Sides clean, gravel bottom -------------- --------- - ---- 0. 025-C 030 <br />5. Sides clean, cobble bottom -------- ------- -- --- ---- --- 0.030-0.040 <br />C. Dragline excavated or dredged: <br />1. No veget ation ----------- ----- --- ---------------- --- -- 0. 028-0. 033 <br />2. Light brush on banks ______________________________ _ 0.035-0.050 <br />D. Rock: <br />1. Based on design section _______ __ _____________________ 0.035 <br />2. Based on actual mean section: <br />a. Smooth and uniform ------------------------------ 0.036-0.040 <br />b. Jagged and Irregular ------------------------------- 0.040-0.045 <br />E. Channels not maintained, weeds and brush uncut: <br />1. Dense weeds, high as flow depth ------ ----- ------ ---- 0. 0". 12 <br />2. Clean bottom, brush an aides _________ ______________ 0. ". 06 <br />3 Clean bottom brush on sides, highest stage of flow 0. 07-0. 11 <br />4: Dense brush, �i b stage ---- ------------------------ -- 0.10-0.14 <br />F-4 <br />IV. Higbway ekannets and 9WAISO with onsixtolond vegetation 6 T <br />glues shown we for velocities of 2 and 6 f.ps.): <br />A. D of Row up to 0.7 foot: <br />.7 1. M K atacky bluegrass, buffalograw. <br />w 02 .= -------------------------------- <br />b. Length 4-6 inches --------------------------------- <br />2. Good stand, any gram: <br />a. Length about 12 inches --------------------------- <br />b. Length about 24 inches - ---------- -------- --- - -- --- <br />3. Fab stand, any gram: <br />a. Length about 12 Inches ---------------------------- <br />b. Length about 24 inches --------------------------- <br />B. De tb of flow 0.7-1.5 <br />1. B ermudagrass, Kentucky bluegrass, buflalograss: <br />IL Moweedd to 2 <br />b. Length 4 to 6 Inches ------------------------------- <br />2. Good stand, any grass: <br />s. Length about 12 inches __ ___ __ ________ _____ __ __ ____ <br />b. Length about 24 inches ---------------------------- <br />3. Fair stand, any gram: <br />s. Length about 12 inches ____________________________ <br />b. Length about 24 inches ------- ---- ----- ---- -------- <br />Mann 'a <br />a range 2 <br />0.07-0.045 <br />0.09-0.05 <br />0. 1". 09 <br />0.304.15 <br />0.14-0.08 <br />0.25--0.13 <br />0.05 <br />0. 06-0. Ot <br />0.12-0.07 <br />0.20-0. 10 <br />0.10-0.05 <br />0.17-0.09 <br />V_ Street an expre <br />A. Concrete gutter, troweled finish ---------- --------- ---- -- <br />B. Asphalt pavement: <br />1. smooth texture -------------------------------------- <br />2. Rough texture -------------------------------------- <br />C. Concrete gutter with asphalt pavement: <br />1. smooth ---------------------------------------------- I Rough ----------------------------------------------- <br />D. Concrete pavement: <br />1. Float " nigh ----------- ---- ------ ------- ----- -- -- - - --- <br />2. Broom finish ----------------------------------------- <br />E. For gutters with small slope, where sediment may accu- <br />mulate, Increase above values of " by_________________ <br />VL Natural ob"m channdn: <br />A. Minor sta as- I (surface width at flood stage less than 100 <br />ft.): <br />1. Fairly regular section: <br />a. Some grass and weeds, little or no brush ._.___ - -__ <br />b. Dense growth of weeds, depth of flow materially <br />weed height ----- __ <br />C. <br />greater than light brush on banks _________________ <br />d. some weeds, heavy brush on banks ---------- ----- <br />e. Some weeds, dense willows on bents ____ -.___ <br />L For trees within channel, with branches submerged <br />at high stage, increase all above values by_.__ -__ <br />2. Irregular sections, with pools, slight channel meander; <br />increase values given In Is-e about ________ <br />3. Mountain streams no vegetation In channel, banks <br />usually steep, trees and brush along banks sub- <br />merged at high stage: <br />a Bottom of gravel, cobbles, and few boulders - -. - -_ <br />b. Bottom of cobbles, with large boulders ------------ <br />B. Flood plains (adjacent to natural streams): <br />-1. Pasture, no brush: <br />a. Short grass ---------------------------------------- <br />b. High grass ---------------------------------------- 2- Cultivated areas: <br />a. No crop ------------------------------------------- b. Mature row crops ------------------------------- <br />c. Mature field crops ------------------------------ <br />3 Heavy weeds, scattered brush ________________ ____ __ __ <br />4: Light brush and trees: 10 <br />s . Winter - ------------------------------------------ <br />b. -Summar ------------------------------------------ <br />S. Medium to dense brush: 10 <br />R . Winter --------------------------------------- <br />b. Summer-: --- ------------- -- --------------- <br />6. Dense willows, summer, not bent over by current -_ __ <br />7. Cleared land with tree stumps, 100-150 per acre: <br />a. N o sprouts - --- --------- ---- ---- - - - --- <br />b. With beery growth of sprouts --------------------- <br />a. Heavy stand of timber. a few down trees, little under- <br />growth: <br />a. Flood depth below branches _______ ____________ <br />b. Flood depth roaches branches ___ _________ _______ <br />C. Major streams (surface width at flood stage more than <br />im ft.): Roughness coefficient is usually less than for <br />minor streams of simila description on account of less <br />effective resistance offered by Irregular banks or vege- <br />tation on banks. Values of n may be somewhat re- <br />duced. Follow recommendation in publication cited I <br />if possible. The value of n for larger streams of most <br />regular section, with no boulders or brush, may be in the <br />rangeof ----------------------------------------------- <br />TYPICAL MANNING BASE "no VALUES <br />0.012 <br />0.013 <br />0.016 <br />0.013 <br />0.015 <br />0.014 <br />0.016 <br />0.009 <br />0.030-0.035 <br />0.035-0.05 <br />0.035--0.05 <br />0.05-0.07 <br />0.06-0.08 <br />�k <br />0. 01-0. or <br />0.01-0.02 <br />0- 04-0. 05 c7z==s <br />0.05 <br />0.030 -0.035 <br />0.035-0.05 <br />0.03--0.04 <br />0. Oary-0. 045 <br />0.04-0.06 <br />0.05.0.07 <br />0.05-0.06 <br />0. 0". 08 <br />0. 07-0. 11 <br />0.10-0.16 <br />0.15-0.20 <br />0.04-0.05 <br />a 06 -0.08 <br />0. 10-OL 12 <br />0.12--0.16 <br />0. D28-0. 033 <br />TABLE 7 - a" <br />DEC 1994 <br />