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Appendix a Summary of the Excess Water Calculation Method and Relevant Assumptions

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Appendix a Summary of the Excess Water Calculation Method and Relevant Assumptions Appendix A Summary of the Excess Water Calculation Method and Relevant Assumptions Appendix A Arkansas State Water Plan Calculation Method Summary for Surface Water Availability Arkansas State Water Plan Calculation Method Summary for Surface Water Availability Appendix A TABLE OF CONTENTS A1. ARKANSAS RIVER BASIN ......................................................................................... A-1 1.1 Arkansas River: ................................................................................................... A-1 1.2 Baron Fork: ......................................................................................................... A-1 1.3 Big Piney Creek: ................................................................................................. A-1 1.4 Cadron Creek: ..................................................................................................... A-2 1.5 Fourche La Fave River........................................................................................ A-2 1.6 Illinois Bayou ...................................................................................................... A-2 1.7 Illinois River ....................................................................................................... A-3 1.8 Lee Creek ............................................................................................................ A-4 1.9 Mulberry River.................................................................................................... A-4 1.10 Petit Jean River ................................................................................................... A-4 1.11 Point Remove Creek ........................................................................................... A-4 1.12 Poteau River ........................................................................................................ A-5 1.13 Poteau River Tributaries ..................................................................................... A-5 1.14 Spavinaw Creek .................................................................................................. A-6 A2. BAYOU BARTHOLOMEW BASIN ............................................................................. A-7 2.1 Bayou Bartholomew ........................................................................................... A-7 2.2 Bayou Bartholomew Tributaries ......................................................................... A-7 A3. BAYOU MACON BASIN ............................................................................................. A-8 A4. BOEUF RIVER BASIN ................................................................................................. A-9 4.1 Boeuf River ......................................................................................................... A-9 4.2 Boeuf River Tributaries ...................................................................................... A-9 A5. L’ANGUILLE RIVER BASIN..................................................................................... A-10 A6. OUACHITA RIVER BASIN ........................................................................................ A-11 6.1 Lower Ouachita River Tributaries (East) .......................................................... A-11 6.2 Lower Ouachita River Tributaries (West) ........................................................ A-11 6.3 Ouachita River .................................................................................................. A-12 6.4 Saline River ....................................................................................................... A-12 A-i Arkansas State Water Plan Calculation Method Summary for Surface Water Availability Appendix A 6.5 Upper Ouachita ................................................................................................. A-13 A7. RED RIVER BASIN..................................................................................................... A-14 7.1 Bayou Dorcheat ................................................................................................ A-14 7.2 Bodcau Creek .................................................................................................... A-14 7.3 Kelly Bayou ...................................................................................................... A-14 7.4 Little River ........................................................................................................ A-15 7.5 Millwood Lake .................................................................................................. A-15 7.6 Mountain Fork .................................................................................................. A-15 7.7 Red River .......................................................................................................... A-16 A8. ST. FRANCIS BASIN .................................................................................................. A-17 A-ii Arkansas State Water Plan Calculation Method Summary for Surface Water Availability Appendix A A1. ARKANSAS RIVER BASIN 1.1 Arkansas River: Mean monthly flow, annual mean flow, and annual runoff data was retrieved from the 2012 United States Geological Society (USGS) Water Data report (WDR) for 2012 for gage station 07263450, Arkansas River at Murray Dam at Little Rock, Arkansas. The entire period of record after river regulation was used. (WY 1970-2012). This gage data was used to represent the entire watershed. The value for 7Q10 flow for this gage was found in USGS, 2008, "Low- Flow Characteristics and Regionalization of Low-Flow Characteristics for Selected Streams in Arkansas", Scientific Investigations Report 2008-5065, prepared in cooperation with the Arkansas Department of Environmental Quality (ADEQ). 1.2 Baron Fork: Mean monthly flow, annual mean flow, and annual runoff data was retrieved from the 2012 USGS WDR for 2012 for gage station 07196900, Baron Fork at Dutch Mills, Arkansas. The entire period of record was used. (WY 1958-2012). This gage data was used to represent the entire watershed, as no other gage was available in that watershed or immediately downstream. The value for 7Q10 flow for this gage was found in USGS, 2008, "Low-Flow Characteristics and Regionalization of Low-Flow Characteristics for Selected Streams in Arkansas", Scientific Investigations Report 2008-5065, prepared in cooperation with ADEQ. 1.3 Big Piney Creek: Mean monthly flow, annual mean flow, and annual runoff data was retrieved from the 2012 USGS WDR for 2012 for gage station 07257006, Big Piney Creek at Hwy 164 near Dover, Arkansas. The WDR indicates that statistics are calculated for the full period of record: WY 1951 to WY 1995 and WY 1998 to WY 2012. However, the published values correspond to calculations made using only WY 1993 to WY 2012. The published values were used. This gage data was used to represent the entire watershed. The value for 7Q10 flow for this gage was found in USGS, 2008, "Low-Flow Characteristics and Regionalization of Low-Flow Characteristics for Selected Streams in Arkansas", Scientific Investigations Report 2008-5065, prepared in cooperation with ADEQ. A-1 Arkansas State Water Plan Calculation Method Summary for Surface Water Availability Appendix A 1.4 Cadron Creek: Mean monthly flow, annual mean flow, and annual runoff data was retrieved from the 2012 USGS WDR for 2012 for gage 07261000, Cadron Creek near Guy, Arkansas. The entire period of record for the gage was used: WY 1955 to WY 2012. This gage data was used to represent the entire watershed. The value for 7Q10 flow for this gage was found in USGS, 2008, "Low-Flow Characteristics and Regionalization of Low-Flow Characteristics for Selected Streams in Arkansas", Scientific Investigations Report 2008-5065, prepared in cooperation with ADEQ. 1.5 Fourche La Fave River Mean monthly flow, annual mean flow, and annual runoff data was retrieved from the 2012 USGS WDR for 2012 for gage 07261500, Fourche La Fave River near Gravelly, Arkansas. The entire period of record for the gage was used: WY 1939 to WY 1994 and WY 2000 to WY 2012.This gage data was used to represent the entire watershed. The value for 7Q10 flow for this gage was found in USGS, 2008, "Low-Flow Characteristics and Regionalization of Low-Flow Characteristics for Selected Streams in Arkansas", Scientific Investigations Report 2008-5065, prepared in cooperation with ADEQ. 1.6 Illinois Bayou Mean monthly flow, annual mean flow, and annual runoff data was retrieved from the 2012 USGS WDR for 2012 for gage 07257500, Illinois Bayou near Scottsville. The entire period of record for the gage was used: WY 1948 to WY 1970 and WY 2000 to WY 2012.This gage data was used to represent the entire watershed. The value for 7Q10 flow for this gage was found in USGS, 2008, "Low-Flow Characteristics and Regionalization of Low-Flow Characteristics for Selected Streams in Arkansas", Scientific Investigations Report 2008-5065, prepared in cooperation with ADEQ. A-2 Arkansas State Water Plan Calculation Method Summary for Surface Water Availability Appendix A 1.7 Illinois River The Illinois River available flow was initially calculated with three different gages in order to determine which gage or combination of gages would produce the most representative values for the watershed. The gages at Siloam Springs (07195430), near Siloam Springs (07195400), and at Watts, Oklahoma (07195500), were analyzed. Data was taken from the USGS 2012 WDR for all three gages. After comparison of these gages,
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