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HomeMy WebLinkAbout97.PPP OCWD_Stormwater Capture Admin. Committee The Importance of Storm Water to the Groundwater Supplies of Orange County Water District Orange County Sanitation District Nov. 11 , 2015 OCWD was formed in 1933 to manage and protect the Orange County groundwater basin . • Santa Ana River is longest coastal river in Southern California • 80 miles from highest mountains to Pacific Ocean • Watershed covers over 2,600 mil �•- . 1 r J S.J",.,e '9 • ',jr1 { r �I y� s -r•�. fjb �i ' „ "'cif ti •ie r . .� y, Santa Ana River r - .1 ! !' , j/' a ► :.: +.rate's+ 143t:..-'�%7 �_ , . .l�F �'1-r -.: w 7 .r� r _ J •r /�' . r "�r low 161 1 f19 9.19 0 fitl l� jrf�1li ro rr� Joll, of ',�; �; 1 n • C71 M to M • FWMJ ther f 7years, DistrictDISS� Over course se o 5 SINCE 1933 has purchased 1 , 500 acres for recharge. Inflatabi Dam lilt IIIIIIIIIIIIIIIJEM `r ail PLACENTIA r nahe in' YORBA naheiii $in a ake LINDA a Jolla Basin Foster- i Huckle e Weir a mer ANAHE 1; Basin sin yinond oil asin asin Ner S Stemr Upper Fiv Coves Ba n., Santa Lower Five Ana Coves Basin! M untain Lincoln Basin lver CFI View Basin ACii VILLA PARK Santiaao easi0 6 Basins Blue • ORANGE Basin .......... Bond Basin o OCVVD Field Headquarters Groundwater Replenishment System N Surface Water Forebay Recharge Structures Recharge Water Pipelines 0 4,000 8,000 W E Recharge Facilities Inflatable Rubber Dam Recharge Facilities Feet Reproduced with permission granted by THOMAS BROS,MAPS R Figure 2-2 Transfer Tube City Boundaries Th Bros.Maps All hgNs reseived. S E OPGE gyp Prior to the early 1990s, a large sand dike ti 9TFR Dlss� had to be constructed to divert water from the SAR. -�� � In 1992, the Imperial • of $3M . Ail i LAW -.Apt M I I Y • 7*0 r• ��- - - Alpof r• L Increased capture of storm water paid for the cost of the dam and control structure in the first year of operation . ■ 1 f� 1 � 0 L .1 r vrie i- The Burris Basin pump station was installed in 1990 . It has a pumping capacity of 105, 000 gpm . Ar y � - Id f. - The US Army Corps of Engineers constructed ti 9TFR Prado Dam in 1941 for flood risk management 'DISS� SINCE 1933 and water conservation . law r r t . • . SINCE 1933 • • • • Is a Is a I • • • I • • WATER CONSERVATION ELEVATIONS PRADO DAM Elevation of s illwa 543 ft. Y ------- ---- -- TOTAL FLOOD TO _________ ____ 505 f_t_. -__- CONTROL COAST RECHARGE �pna _ 498 ft. I CAPACITY BASINS Santa I NON-STORM 174,000 acre feet R�vec STORM SEASON SEASON 20,000 10,000 acre feet acre feet Water percolation from basins RESERVOIR AREA • estimated 34,890 ofstorm • was captured in the Prado Conservation Pool, SINCE 1933which was worth over million • • December Storm 100,000 90,000 80,000 c� 70,000 c� L 0 60,000 co a° 50,000 0 Seven Oaks Testing 40,000 30,000 Max. Conservation Pool Storage (af) March Rain v 20,000 10,000 0 0 0 0 0 0 0 I I I I I I I I I I I 1 Q (n Z LL Q 22t Month GE CO The amount of storm flow arriving at Prado Dam started 9TF R D 15S increasing in the 70's due to watershed urbanization. Future storm flow volumes may • • oil due to other agencies capturing storm . • ■ water, , permit compliance, • Ilk I ■ ;I' I I � �Ir • • •• •• • • F-t�C'E CMG � ya 9TFR 'DISS� Source waters to the recharge system SINCE 1933 have changed over the years . 300,000 °GWRS ❑Purchased Water ❑MWD Recharge 250,000 ❑Storm Flow Recharge ❑Recharged Base Flow 200,000 L 150,000 100,000 Q 50,000 0 C0 O Iq 00 N t0 O Iq 00 N tG O Iq 00 M Iq Iq Iq L0 L0 t0 C0 C0 1` f` 00 00 00 N CO O 0) O O'IT 00 r r r r r r r r r O O O CD CD r r (V N N Year (1936-1990 is Oct-Sept water year, 1991-2010 is July-June Fiscal Year) Over the past 20 years , storm water FWMJ DISS� SINCE 1933 recharge exceeds 50 , 000 afy. 140,000 • 56,000 afyi Adik 120,000 4� :u 100,000 a) L 80,000 Q< 60,000 L 40,000 E O 20,000 U) 0 W O iT 00 N W O Iq 00 N W O Iq 00 N W O 41 00 N M III iT Iq 0 LO W W W 1` f- 00 00 00 M O O O O � Q M M M M M M O O O M O M M M M O O O O O r r r r r r T- T- T- r r T- N N N N Year OP�GE gyp Over the last decade, storm water has ti 9TFR Dlss�� provided 16 percent of total recharge to the basin . Storm flow range: 8 - 23% of total recharge. 600,000 1:1 Incidental Recharge EGroundwater 500,000 ■ Recycled ■ Imported/Purchased Water [:]Storm Flow/Local 400,000 - [IS'- Base Flow ■ ......................................................................... 300,000 ■ s � � 200,000 � ■ ■ 100,000 ■ Q ■ 0 ■ LA W 1` 00 0) O r N M O O O O O r r T- T- r O CO r` 00 Cn O r N M O O O O O O r T- T- r N N N N N N N N N N Fiscal Year F-t�C'E CMG y - Clogging is a primary constraint to TFk D l SSA increasing SINCE 1933 recharge . 140 11 11 120 Avg. •- cf s w. • -102 11 ' - 14 1 ` - 1 1 • • Nade • 1 IV 40 20 L A Y 1 1 30 61 91 122 152 182 Days in Operation t ' a . 410 ti � � to , •e,� —'FA� ,�� '� i �i�` i • R t ia!p AGE Cp gyp Five sediment removal technologies were tested to 9TFR Dlss� assess if Santa Ana River water could be treated to reduce clogging. Any method that used a chemical resulted in low percolation rates. Flocculation-Sedimentation Dissolved Air Flotation Ballasted Sedimentation t l .1 Cloth Filter Riverbed Filtration JV - ,! -tip J The • • Filtration • natural filtration processes to remove suspended sediments in the water. /.� Apr- 110 PO Ck r. vS�---•• +ems�,.... �� .ir-�.�.-��' r - - �;:, ,r _ �T.�' ,� �I' ..:.1�_�.�. �,...c:.:�;».�....,. y _•� � r �-�' - 1, 1l1 ter �nax y fX o jC yr. L Iz s � � err�''L:ZF Yr,��..,ti�''•�+7.`�•'�5� _ w.:,. oP� E gyp The demonstration scale Riverbed Filtration ti 'TFR Dlss� system will I convey treated water by Y Y SINCE 1933 to Olive Basin .1.6 �J _ -- ,�I oc ■ 14, Lij Ao� """"�i �.. � � ,•r. ` r , ON Expanded �. �� t I+� •, ,_- —,- System Olive Treated Water 4.. Basin '' , -��.� Existing Pipeline ` .-- Riverbed Filtration System ..wartry Target capacity: 15 cfs (6,700 gallons per minute) The cloth filter treatment technology is being tested at River View Basin . y j s"W - Burris Basin IJy tr' GO ar Backwash Basins - �_ Cloth Filter Unit aeo fill pull ; 1k I D IPAl a. OCWD is looking for ways to preserve the conservation pool by removing trapped sediment 9TFR Dj SINCE 1933 from behind Prado Dam. -y Storage capacity below elevation 505 ft 1941: 45 000 of 7 r (^ 2008• 20,000 of Prado Basin Loss of 25,000 of Area 10,250 acres Deposition of 600,000 cubic yards per year below 505 ft Total sediment inflow to • ' , .�; , . Prado 1M cubic yards a,� °r'►'w''"� "oo per yea r 24 Imp 068Dp41_GIoE ��, � .. Questions ? 76 _S Z �-- s.c AM- ............. " r Contact Info. Ada Hutchinson m Recharge Planning P ahutchinson@ocwd. :..-_ 714-378-3214 San Bernardino County NV Los Angeles ,�""' �" '� "'��% Yorba- t .� IF County � Linda j CA F;rllrrtt�n Water Lt District PACIFIC OCWD @P Buena OCEAN La Park r e i alma i a ; t. �O is Golden Anaheim Serrano y„d ` State Water j Water District Co Orange • .,;� Riverside Garden ,i Grove East aCountyg ' y - county .�• Seal Westminster Water �! - tR Tustin Beach Dist.��` �'�•.�� yr ' t Santa ,.� Ana •� Huntington "�. �= s r ,1- , ,•'�• Beach Fountain ! '•�'• "is = Valley Irvine .�• i Ranch Water Mesa District �• Consolidated -� Watery Orange �• Dist. ;• �� County �'•�, '\ Newport y' �• '� �- Beach ' OCWD Service Area f � i•,�OCWt7 Boundary Pacific �•,. = A - 4% 1 County Boundaries O c e a n IM Non-Retail Water Agency Orange County Water Producers N 0 3 6 " w c Miles r ✓ Basin geology limits the area where surface U recharge SINCE 1933 HUNTINGTON SANTA ANA Recharge Area Pacific BEACH Ocean O © INJECTION WELLS B 0_ Shallow AquifierA 500— feet Amber Princi Colored Water l�ffier Natural discoloration q' CROSS SECTION LOCATOR MAP 1.000— from ancient buried plant feet and woody material. 1 I A o 1 J RECHARGE 1.500— BASINS \ feet Newport- Inglewood 1 Deep T IS Fault Zone I Aquifie` Peralta 1 , 2.000— 1 HIIIS SANTA feet ANA Fault RIVER 44,00, 2,500— 1 feet Consolidated, Aquitards Aquifers F-1 non-water-bearing ❑ Low-permeability clay Water-bearing C formations and silt deposits sand and gravel AREA MANAGED BY OCWD Most groundwater production is from the Principal Aquifer.