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CSOP MODEL EVALUATION AND RECOMMENDATIONS Revised on May 9, 2005 - PowerPoint PPT Presentation

May 24, 2023 •584 likes •714 views

CSOP MODEL EVALUATION AND RECOMMENDATIONS Revised on May 9, 2005 PURPOSE OF THE PRESENTATI ON REVI EW THE 2X2 MODEL RESULTS FOR THE EAST AND WEST BOOKENDS, ALTERNATI VE 3 AND ALTERNATI VE 4. FOCUS: CHECK FOR POSSI BLE I MPACTS TO FLOOD

  1. CSOP MODEL EVALUATION AND RECOMMENDATIONS Revised on May 9, 2005

  2. PURPOSE OF THE PRESENTATI ON REVI EW THE 2X2 MODEL RESULTS FOR THE EAST AND • WEST BOOKENDS, ALTERNATI VE 3 AND ALTERNATI VE 4. FOCUS: CHECK FOR POSSI BLE I MPACTS TO FLOOD LEVELS • OF SERVI CE (LOS) I N DEVELOPED AREAS (URBAN AND AGRI CULTURAL). DEVELOP RECOMENDATI ONS TO PREVENT LOSS OF FLOOD • LEVEL OF SERVI CE FOR ALTERNATI VE 5.

  3. AVAI LABLE MODEL RESULTS POSTED AT CSOPWEB – May 3, 2005 ALTERNATIVE 1 (EAST BOOKEND), ALTERNATIVE 2(WEST BOOKEND), ALTERNATIVE 3, ALTERNATIVE 4 AND ALTERNATIVE 7R5(EXISTING CONDITIONS) ANY MODEL I S LI MI TED BY THE QUALI TY OF THE • DATA AVAI LABLE AND ASSUMPTI ONS MADE. AS A RESULT ONLY A COMPARATI VE ANALYSI S WAS • CONDUCTED, BY EVALUATI NG EACH ALTERNATI VE PERFORMANCE AGAI NST ALTERNATI VE 7R5 (EXI STI NG CONDI TI ONS RUN). THI S COMPARATI VE PROCESS REDUCES THE I NFLUENCE • OF THE MODEL UNCERTAI NTI ES I N THE DECI SI ON MAKI NG PROCESS.

  4. HOW GROUNDWATER LEVELS AFFECT DRAI NAGE PERFORMANCE • TYPICAL DRAINAGE SYSTEM GROUND LEVEL • 3 TO 4 MILLION LINEAR FEET OF DRAINAGE NETWORK LOSS OF CANNOT BE RETROFITTED LEVEL OF SERVI CE GROUNDWATER LEVELS DRAINAGE SYSTEM

  5. TARGET AREAS OF WATER LEVELS I N WCA-3B AFFECT WATER LEVELS I N URBANI ZED EVALUATI ON AREAS WCA-3B S-335 BELEN & 2326 SWEETWATER BELEN, SWEETWATER, SERENA LAKES & COUNTRY WALK – FLOOD PRONE AREAS G-211 SERENA LAKES & COUNTRY WALK S-331

  6. STAGES ON WCA-3B – DEPTH 2.5 FEET 8% ALT1(EBE) PERFORMANCE MEASURE TARGET ELEVATI ON HI GHER % ABOVE TARGET ELEVATI ON MEANS LONGER HI GH STAGE DURATI ON, MORE SEEPAGE AND NEGATI VE I MPACT ON THE ENVI RONMENT AND FLOODI NG 4% 17% ALT7R5 35% ALT3 & 4 ALT2 (WBE)

  7. RI SE ON L-31N CANAL STAGES - ALTERNATI VE 4 – S-331 RI SE OF 1 FOOT ON MEAN CANAL LEVELS CAUSES RI SE ON WATER TABLE TO THE EAST ALT 4 MEAN STAGE~ 5.2 EXI STI NG CONDI TI ONS MEAN STAGE~ 4.2

  8. SERENA AREA AND COUNTRY WALK 2X2 RESULTS WATER TABLE STAGE DI FFERENCE RI SE OF 1 FOOT ON CANAL LEVELS CAUSES RI SE ON GROUNDWATER ALTERNATI VE 4 – ALT 7R5 TO THE EAST OF L-31N-> NEED TO CONTROL SEEPAGE L-31N SERENA & COUNTRY WALK I N THE SERENA & COUNTRY WALK AREA, THERE I S A TENDENCY FOR I NCREASE OF GROUNDWATER LEVELS WHEN COMPARED TO ALT7R5 (“EXI STI NG CONDI TI ONS”) NOTE ON LEGEND: POSI TI VE NUMBERS MEAN I NCREASE ON WATER LEVELS WHEN COMPARED TO MODELED EXI STI NG CONDI TI ONS (ALT7R5) Files:depth.alt4.roco;depth.alt7r5.roco

  9. ALTERNATI VE 4 - CONCLUSI ONS • I N URBAN AREAS (SERENA LAKES AND COUNTRY WALK) GROUNDWATER LEVELS I NCREASE APPROXI MATELY 2 I NCHES WHEN COMPARED TO ALTERNATI VE 7R5 (“EXI STI NG CONDI TI ONS”). • MODEL OUTPUT I NDI CATES POTENTI AL FOR HI GHER GROUNDWATER LEVELS EAST OF THE L-30, L-31N AND L-31W CANALS. THERFORE THI S ALTERNATI VE I S SLI GHTLY WORSE I N TERMS OF FLOODI NG THAN ALTERNATI VE 3, WORSE THAN EAST BOOKEND (ALTERNATI VE 1) BUT I S AN I MPROVEMENT WHEN COMPARED TO WEST BOOKEND (ALTERNATI VE 2). • A 1-FOOT RI SE ON THE CANAL LEVELS ON THE L-31N CANAL BETWEEN G-211 AND S-331, WHEN COMPARED TO EXI STI NG CONDI TI ONS (ALT7R5), CAN RESULT I N FLOODI NG TO THE EAST, DUE TO SEEPAGE RESULTI NG I N HI GHER GROUNDWATER STAGES. • MODEL RUNS I NDI CATE THAT UNACCEPTABLE HI GH WATER LEVELS OCCUR 17% OF THE TI ME I N THE WCA 3B, I N THE VI CI NI TY OF THE L-30N CANAL; UNDER ALT7R5 (EXI STI NG CONDI TI ONS) THOSE LEVELS OCCUR 4% OF THE TI ME.

  10. ALTERNATI VE 5 – WI SH LI ST FOR MODELI NG ADEQUATE CONVEYANCE CAPACI TY UNDER TAMI AMI • TRAI L TO I NCLUDE EVALUATI ON TO I NCREASE S-356 PUMP STATI ON CAPACI TY, TO REDUCE HI GH STAGES I N WCA-3B CONTROL FOR SEEPAGE I S NEEDED TO PREVENT LOSS OF • LEVEL OF SERVI CE TO THE EAST, FROM S-335 TO S-331, PERHAPS I NCLUDI NG MODI FI CATI ON OF S-331’S OPERATI ONAL CRI TERI A TO AVOI D HI GH STAGES I N THE L-31 CANAL PASSI VE CONTROL STRUCTURES ARE NEEDED ON L-67 • CANAL TO AVOI D EXTREME HI GH STAGES I N WCA-3B NO FLOOD I MPACTS TO URBAN/ AGRI CULTURAL AREAS •

  11. CLOSI NG STATEMENT DUE TO MODEL LI MI TATI ONS AND THE POTENTI AL FOR FLOOD I MPACTS, MI AMI - DADE DERM REQUESTS THAT THE CSOP STRUCTURES BE PLACED I N OPERATI ON AFTER DETERMI NATI ON OF OPTI MUM STAGES, BASED ON FI ELD TESTS, TO MAXI MI ZE BENEFI TS FOR THE ENP WI THOUT I MPACTS TO FLOOD LEVELS OF SERVI CE I N URBAN AREAS

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