HomeMy WebLinkAboutCT 76-15; PALISADES POINT; DRAINAGE STUDY; 1981-10-28----------
-~'~ J==V=A=~=DE=L=L=A=N=D="l=A=SSf=0=C=IA=T=E=S.=IN=C=. =d P/tO.lECT· CARLSBAD TRACT 76-15 11'110.1·1<°.202.07 CIVIL EN~INE~S IT. ERA I DATE. 10/2'8/81 rCI( I
SURVEYORS ~i LAND PLANNERS PAGE
17801 CARTWRIGHT ROAD ,f IRVINE. CA, 92714 07
SUITE A . / \. 714-966-1100 8
PALISADES POINT
CITY OF CARLSBAD
TRACT 76-15
OFF TRACT DRAINAGE STUDY
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"" , P1tO.:lECT·CARLSBAD TRACT 76-15 I PROJ. N~02 07 ~'J& VAN DELL AND ASSOCIATES, INC.
BT' EKA J DATE· 10/28/81 I CK I CIVIL ENGINEERS . PAGE SURVEYORS LAND PLANNERS
17801 CARTWRIGHT ROAD IRVINE. CA. 92714
SUITE A 714-966-1100 PALISADES POINT
The purpose of thi·s study is to determine the impact of the
.. proposed developement:. Palisades Point (Tract 76-15), on the City
of Carlsbad's Master Drainage plan. Currently the Master Drainage
Plan divides the area in the vicinity of Pali.sades Point (Tract
76-15) into its natural watershed areas. The proposed· drainage plan
will significantly alter the natural areas. This study will detail
the· revisions to the Master Plan and provide calculations to demon-··
strate~he ability of the downstream systems to accommodate the .
revisions.
The Master-Drainage Plan divides area 422 into 11 sub-areas. The
proposed drainage plan will revise sub-areas 422-6, 422-7, 422-8,
422-9 as follows; two-thirds of sub-area 422-9, half of sub-area
422-6, and one-third of sub-area 422-7 will be combined as Sub-area
A, for a total of approximately 26 acres. One-third of sub-axea
422-9, one-half of sub-area 422-6, two-thirds of sub-area 422-7, and
all of· sub-area 422-8 will be combined as Sub-area B, ·for a total l
of approximately 46 acres.· The above revisions are highlighted on
the following page.
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CIVIL ENGINEERS SURVEYORS LAND PLANNERS ~~ VAN DELL AND ASSOCIATES, INC.
1===1780=1 C=AR=TWR=IGH=r R=OA=D ===IRV=INE==, CA==. 9==2714===t OFF TRACT ORAl NAG£ STUDY
SUITE A 714-966-1100
CALCULATIONS
SUBAREA A: AREA =25," AC.
AT TRAC.T..7~-IS 13OUN~ 1~/B.q!>f1l11 ~o~/B/1c~~-cr.IJ'iIB/Ic., .
FLOW CONTINUES I.N .5.D. AT :3~()-AVE. S'l..DPE FOR
. . -.
. APPfex, f1So' TO £L CAM ,~O R~L.. ASSUME V::3~~,
J
-r ~ Q60 J..L" -£ 3 ' li-3" ~~()) -:J. fItlll
.. ,
Tc. ~2412f11ifl' .~ IIf)= 1./ ~
. &r~ 18.Q + .55{M) (25,6-18) ~ 23,ScfJ$
USE 4Oc~$ A'T POINT OF CONCENTRATION. "
PLAN VIEW
~~-===~~~~
~. •
PROFILE.
"*REF. TRAlT 73-S 1:p. SJ[f: 12 Jr~.
"," ~V& VAN DELL AND ASSOCIATES. INC. P/lOJECT'CARLSBitD fR.76-15 .I!'ROJ. N0'2()2.07.fj7
CIVIL ENGINEERS 8T' EKA I DATE' j()-z~~BI I Cit I
SURVEYORS LAND PLANNERS
17801 CARTWRIGHT ROAD IRVINE, CA. 92714 ()FFTRACT DRAlNA6E SlUDY
SUITE A 714-966-1100
!tSSUME FULL PIPE A·T DOWNSITAM. OUTLET.
4ZIlX2':j" eS.P-/J. = 3'" ~ c.s:P. : I (I-::t9.02t1
K=3GI. 6)= I<SYz.
s~=-(~=") 0.0123
B5,bB+2,42'~ ee,1 :/-I.6.L@ ()U7L£T
8B.li tR,5(,()('J3)::. m,l ~t-IGL~ G.R
LOCATION &F OPEN CHANNEL Fl.fJW
eqt2.-+~~:X: 81.01~ ~b X
fj1:z -ff1f8. ;.: X -SD-S,
gQ,2-e9d1 -=-2,~ I
&'055-()JJIZ
.'. FLOW IS OP'£N cHANNEL
APPRox92' UPSTREAM OF
T J.l-I= our L £'1. . -
CHECK CAPACITY OF 30 "R.C.P,·
Q=KSJ-z '=410~/(O.()J~ji= S5:0cJ5
.'.', 30-'t Rep WILL FLOW OPEN.
PAGE
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~rru · VAN DELL AND ASSOCIATES, INC.
CIVIL ENGINEERS SURVEYORS LAND PLANNERS
17801 CARTWRIGHT ROAD IRVINE. CA. 92714
SUITE A 714-966-1100
OFF TRACT PRAINA6E" STUD'( I
SU8AREA B: AREA=46.0 A!.
ATTRACT 7~-15 BOUNDRY1 T~=2Qr.3}Q,()'='32.2 )cj-A-::.3;,411~1
FLOW CONTINUES IN S.D. AT 9% AVE. SLOPE. rOR
APPReX. 65r/ TO EL CAMI.NO ReAL t ASSUME V=JS-Pps,.
-r-~ '50 (..l \ -rl-,.., . '-l-'/5 feo J -u. U:. fit I fI
T~~ 2{,Ornil1 ~ I,o = 1,9!J'1..,
~= ;2. 2 + t 55 (/,q)(1.6.0-'33.4) = 45.4ds
USE ~ods AT POINT OF CONCENTRATION,
. f .
EXIST O/ANNEL
PLAN VIEW'
PROFILE
~~ VAN DELL AND ASSOCIATES INC. P/tOJECT·LAPLC.f?AD TR 76-/5 " J PROJ. No{1:RlfUll
CIVIL ENGINEERS' ST'ckA-I DATE'I()-Ze-~/ 1 CK I
SURVEYORS LAND PLANNERS PACE
," , 17801 CARTWRIGHT ROAD IRVINE, CA. 92714 OfF TRACT ORA} NAG£" STUDY Z
SUITE A 714-966-1100 8
ASSUME FULL PIPE AT DOWNSTREAM OUTLET,
36" f?C,P. I n= O.()13 K-= 6~"Ft ~ z '5.p=r(~t =J~'f-~.a:e ;t,2~ ~: ~ _II cr< ~~b91 z.~ 29 2'3 -I
'9.73-+3.0:= 72.7::: H6L@!Jt.ITLEt
""" ~ t h~ -="L'~ I ~II;; ~/lq I ~ ;::,f)f)33'/'l'!
,hl~ ",(I)8(;.41)f 2 ((): U(lt I) + &0033(9~l/.J):: 2.50
H6L@(.B.= 7217+21~O:: 75,2. ;
UXATION OF OP£NCI-IANNEL FLOW
" " 24"RCP) rl==.()13 . K= 22~.2.
5.p ==ri&.J: ---o. (J10
75.2 +S.pX= ?2.QS+>eK"
75.Z-72fI5 -::: X "
<;f)-5p ,
.. 75.2-72.Q5 _ }/Q "":
(J. fJ[f1-{),fJ70 -O.T-
t~' FLOW IS ()PENCflANNEL APPROX. 36Z'UPSTREA-M'"
OF THE e ~
202.07.07 ~i~--------~----------------------------~--------------------------~~~~~~ "~~ VAN DELL AND ASSOCIATES, INC. PI!OJECT' CARLSBAD TRACT 76-151 PIIOJ. NO.
,-======C=IVI=L =EN=GI=NE=ER=S========I 8f' F.T{~ , I DATE' 10/29/81 .1 CK I t-SURVEYORS LAND PLANNERS
17801 CARTWRIGHT ROAD IRVINE, CA. 92714 PALISADES POINT
SUITE A 714-966-1100
The estimated flows used to calculate the hydraulic
grade lines are conservative ·for the lO year'deslgn---'
storm, and·the resulting hydraulic grade lines ~re
well below the finisheq.surf.ace--in all-areas •. So,·
al though _ the.~ .proposed~·.drainage. plan: -for:Palisades· --
Point .(Tract 76-15) is different from the Master
Drainage Plan, this study has demonstrated that the.
downstream storm drain system can accommodate the
proposed revisions.
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I ' PROJECT. CfrC.t-58/;0 ~V& • ! T ,.ROJ. NO i2'J. '7 "'-1. ~ .' '
\ VAN DELL AND ASSOCIATES. INC. IT' :fA&' I DATE'
.. ?-/~ .'a .. • ,; CIVIL ENGINEERS 9 /::~' 'IV I cKJ""cH IIOldJlel
SURVEYORS LAND PLANNERS PACE
17801 CARTWRIGHT ROAD IRVINE. CA. 92714 OF
• SUITE A' 714-966-1100 REV lo-27-el ~.
,
\1 //
/?4(/6APES !=bINI
iR. 16-/5
!/YP£'!lN-IC
-ULCVL/lr/CJN5.
-
-
.. '
" , PROJECT'CI-JRLSBflD TR 76-15 I PROJ. N00)Z,071Ji ~~ I=
==V=AN==::D=EL=L =AN=D =AS=SO=CI=AT=ES=, I=NC=. ====jaT. f5KIt , I DATE./~~26-ej{ CIVIL ENGINEERS SURVEYORS LAND PLANNERS
LIN E ". t" -I' 17801 CARTWRIGHT ROAD IRVINE, CA. 92714 . n
SUITE A 714-966-1100
AT THE UPSTREAM JUNCTION, STA 9+1f1.(7) FLOW WILL
PASS TURU Q:. I N THE PI PE FROM q+174B 70 6+39. e7)
Q -= 3.,Q df D~ == (j. b& ') ,DI}:;: fJ.3/' 1-L::. 277. ~ I: . . I I
S}NCE TH£ DISTANCE IS SO .GRElf'; IT IS S!1FIE. TO
ASSUME THAT TH£ FLOM/, WILL BE NORMAL BEFORE
THE NEXT STRUCTURE, JA t1 A I----------~. 3./9,(1'5 :> I J.S; I ~ 13/5o~5
JUNCTION @ 6-+,7.68 : . D;. "o,~/; e=45D'71 Dn=tJ.66 ,
.Hj FRCt1 THOMPSON E Q
:: ().3' (5~E. ((p, 7~)
ASSUMING Tl-IAT $1
. , APPROXIMATES THE
•
ct ~tJ.be {' Q -= 1.37' IO,~9c'f'S ~
¥=lr>1 ' ~~~, \fJJ3AS s~u m ---'--:; - _ :--t~_.~ " -,--D --___ n
BflCkWAT£R DIA6RAM BACKWATER CURVE) ,
THE. JNFLUENCE WILL 'EXTEND ABOUT 21 UPSTREAM.
1 N THE PIPE fRDM -6t35.4<t TO 3+/3.03)
. ()=13.5B cf.s I Dc. -:;/.37'1 Ora ~ (), 6" ') q.. L=-322,4f, I.
FLOW WlLL BE NORMAL BEFDRETHE NEXT 5TRUCTURE.I
~~I==V=AN=. =DE=LL=A=N=D=AS=SO=C=I~=E=S'=IN=C.==~ CIVIL ENGINEERS SURVEYORS LAND PLANNERS
17801 CARTWRIGHT ROAD IRVINE, CA. 92714
SUITE A 714-966-1100
LINE A-I\
I N THE PIPE FROM 2t96.0DTO /t38.85;
~-= 24.26 c~s I Dc ~ 1148', D,. ~o.90 ~ L~ 159. 75'
ASSUME FLOW W(LL BE NORMAL 8£FORETH£ NEXT
STRUCTURE.
JUNCTIONS @ J+ 36.66 4-. f+le. bb.
l D.33cP5
24.2' c~ > I J~s. r
VII-:(AfJ~ e::7tU3f ,.'
(k;I,4B
4.2.6c~
------
1-lj~·1.()8 (SEE P6~JIcJ)
INFLU~NC£ DJST={e' .
------
~
H: ~ 6).30' (SEEAS 8o-fCt)
'J
" .INfLUENL~ 015T'3: I~ '.
BACKWATER DIAGRAM
DOWNSTR£AM CONDITIONS
THE PRoPOSED STORM DRAIN JOINS £XJST/NG @>
SiA. (}tQ5 f 27. AT TI-IAT P01NiT THE. GRADE CHANGES'
fROM 1,5~ TO 10.CJ%. FROM THERE THE PIPE
cONTINUES@ 10.<1% FOR J IS' TO THE NEXT JUNCTION'
STRUCTURE:. "JT 15 SAFETO A6SUMETHAT THE'
FLOW WILL RETURN To DA~Of92' VIELL.BEFORE
TH-E NEXT J,S. AND TJ.lAT ANY BACKWATER eFFECT
WILL NOT EXTEND FARJ:NOUGH UPSTREAM TO EXERT
ANY CONTROL,
·
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, PItOJECT '(A kLS.t ~AD (I<. )~-15 T PROJ. HoZtJ2f)7.fJ1 ~V& VAN DELL AND ASSOCIATES, INC. IY' ~KA-DATE-IO-27-Bl I CK JOI I/O(zB/BI CIVIL ENGINEERS SURVEYORS LAND PLANNERS 'A-2\ PAGE
17801 CARTWRIGHT ROAD IRVINE. CA. 92714 L}N8 ~ SUITE A 714-966-1100
AT THE UPSTREAM JUNCTION J STA Q+14.1'; FLOW WILL
PA5S TI-lROU611 Q. IN TH E PIPE FRO M Cj-f/4.f1 -fO
~+28~a7) Q=-5.75ds~"/ ·D~=Og3' ··i 0" ={).43 , . I ~ L= 2g6.2.4~,
ASSUME NORMAL DEPTH IS 'REACHED BEFORE.THE
NEXT STRUCTURE ..
JUNCTIoN @ 0+2'.6B ADDS NO ADDITIONAL .'FLOW SO
THE SACK·WATER. EFfECT. IS NEGLJGI,BLE,
INTHE 'PIPE FROM 6724,49 TO 3-r33.00;
/)~5 75 cP~· 1\ =: O.Q3 I (). -= 1)/{1' ~ L 7-CiI.4J I ~ -l"k I 11 J .
ASSUME NORMAL DEPTH: tS REACHED 8GroRE THE.
NE)(T STRUCTURE.
I·
SEE Stir: J JUNe. @ 3t(}f.91 (M-I') J./6L -;:152'/)6
" .
INV. H.G.&,.. SIC-. ·v V2 Av •. E.G.L • -= STA. 0 41 A Q K S, L ", M "I h ' ELEV. ELEV. TION 2 Q Sf b t ELEV. OtO/,78 141,42 2'1-152~ IS?) 1,5 1,77. 7,52 13,3J 0,00 IfJ5 ~/6t ,0161 !e,51 0,14 {),t1 ISZ.CJ1 Diiii f)+/O,2Q '4q,5~ ~l4 11.52,ZQ n II I ( 7.5Z /3,31 o.ee II ,Clbl Il63.08 /)(~ t9.33 0.47 ~14 &/6/ ()f?f1, b2 p;o.a, ~75 I~/-II (I I( 7.~2 [3.31 ' o.~B f /I, ,01" (53/11 ~~ ~ ~ .... ~ >0 ~ < h,,= O.25JL ij)[~ [9)=6l ~5~ ~(g-~ ~)=t9,{ rf ?:i 0 ~
~f)1 6/' I%~ O,q{ ~'cn i ~ z
(}fCJ6.24 16J1)3 ~¢I 153,i2 (B~ i,?? 7l/2: l3.51 0.86 105 ,ul6l i!! c /,5 151UJ CO) m
J/}J5 4.38 ~01 ()'7b aBO :!i r
/+W,Gz J51./J l3rI6 /55fJ7 II : Ii' If 3,25 5.75 ;(),3,~ ! ,If ! (J}?J) /55.10 ~ ~.-
)0 r~ o Z , , ~~ 22at ~.~ ()'~7 6275 !:2 c 3-t2B.~2 J~7!J ~,52 I 55.e2 I( Il " 5.7, 1133 ", 156)5 G) 325 Cf5j{) z~
h},'::j ~251r ~~ 33)= 19.&7 i~ 0 .' ,m:tJ 1;.38 &J,f}{ ,~2 ()lJ3 (")
3+53,()() )Jfi:% 1/,'11 J:S5fi5 18'tJ }.l) }t77 ' ,3~Z.' ~75 6133 1&5 ,aBO (56'('8 );
:0 > -f < m -z en ~~ 0 ~
i~ s: z OPE N eM ~Nl r-L'Fl Ifjw~ -' . z (") r~ b'\M __ !§ z .
8 .... ~ ... en
C F~ ~ 3~ 3.00
! I ~ :z: ~ -< a r-~ :a • -"" ( c ~ ~ r-n ':::::::-
n ~ ,. ~ r-.....,
F ~ '<b -~ ..;. I--
(5 ! z 8 (/) ':I: ~ '" '" -..... ....
I--
~ ,
~~ I . '~I~ ,.
~-.J\i~ ~
-~"
'~fJ& ',I====V=AN===D=EL=L=A=N=D=A=S=S=OC='A=T=ES=,='=NC='======l CIVIL ENGINEERS SURVEYORS LAND PLANNERS
17801 CARTWRIGHT ROAD IRVINE. CA. 92714 / A I / r-:::::,-.S
SUITE A 714-966-1100 flY t-t:-I' .
--
SF~ [f.yz 7-.; ·S,_ e::) ,:oo/~
tf~ . (,lAtJI6 )(7 :87' )
v",j ,; ~~?6" 2.6t ..
IT ,2.., 1 '
&Ely~/rj';c.& lo;;S. =-
VZ-/ .. I) _ 0;:: ~07 '. • ,? •
. ?j
LINE A-t
Juctior Loss from Station 6+37.~8 to Station 6+37.68
Q2*V2 -Q1*V1 -Q3 x V3*CQ$(THETA3)
DeLta Y ; ------------~------------------~--.5 ~ 9 * (A1 + A2)
(1 3.58) ( 18 . 1 1) - ( 3 . 19) (11'.81 ) - ( 1 0.39) (21 .2) co s (45 )
= ---------------------------------------------------16.1(,27 + .75)
52.51
= -------
16.42
;;. 3 .. 2 '
Delta Ii ;: DeLta Y + ·V1"'V1/2g -V2"'V2/2g r-::: 3.2 + 2/17 -5.1
= .27'
Juctior LOss from Station 3+09.94 to Station 3+G9.94
Q2*V2 -Ql*v1 -Q3*V3*COS(TH~TA3)
Delta ¥ ~ ----------------------------------
.5 * 9 * (A1 + A2)
(24.26) (1 3 • 71 ) - ( 13 .58) (7 .67) -(1 0 .68) (6.03) cos (43 .43)
= -----------~--------------~--------------~-~--------~-16.1 (1.7·7 + 1.77)
181 .6"8 '.
= --------
56.99 .
• = 3.19 I
Delta H = Delta Y + V1 x Y1/2g = 3.1,9· + ~91 -?92 = 1 .18'
V2*V2/2g
I I'
"',.
LINE I\-}\
, .
Juctior LOss from St~tion 1.18.66 to Station 1+18.66
Q2*V2 -Ql~V1 -Q3*v3*COS(THETA3)
Delta Y :: ----------------------------------• 5 .* 9 ..,.. (A 1 + A 2 )
.<32.16) (11.-91 )-(28.85) (9.19)-(3.31) C.2.69)cos(90)
= ----------------~--------------------------~-----~
117.89
:: --------
94.02
:: 1 .25 '
~Oe l t a H :: Delta y + V1 .... V1/2g -v27<V2/2g
:: 1 .25 T i .31 -2.2
:: . 36 I
Juction LOss from st~tion 1+36~66 to Statior 1+36.66
Q2-V2 -Q1 ""V1 -Q3*V3*COS(THETA3) -Q4""'V4~COS(THETA4)
-O~lta Y :: ------------------------------------------------------~ .5 * (A 1 + A2) 1< 9
( 2 8 • 85 ) ( 1 6 • :3) - ( 24 • 26) ( 1 3 • 71 ) - ( • 33) ( • 19 ) cos ( 90 ) - ( 4 •. 26 ) (, .41 ) cos t -4:6 .33 ) . . -'
:: -----------------~--~----------~-------------------------~------~-----
16.1(1.77 + 1.77)
130.56
--------
56.99
:: 2.29'
Delta H :: Delta y + V1*V1/2g -V2*V2/2g
:: 2.29 + 2.92 -4.13
:: 1 .08 I
--:' --""'"""""'""' ...... ~-=----.-.--..... -.---... -.. -. -
., .ql?
J~ctior LOss from Station 0+98.43 to Station 0+98.43
42*V2 -Q1*V1 -Q3*V3*COS(TKETA3) -.G4*V4*COS(THETA4) Delta Y = ---------------------------_________ ---_~_~ ___ ---_____ _
.5 * (A1 + AZ) * 9
( 1 3 . 31 ) (7 • 52) -(4. 74) (2 .68) -(2 .56) (1 .45) c o·s (90) -(5 .5) (3. 11 ) co·s (90) = ------------------------------------_ ..... ----------------,---'-----------
16 .1 (1 • 7"'1 + 1. 7 7 )
87.39 = -------
56.99
::: 1.53'
D~lta H = DeLta Y + V1*V1/2g -V2*V2/29 = 1.53 -+-.11 -.88
:: .76'
,";' -'. " -. ., ,--..
"-' <, ".,. ,