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WSP04352
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Last modified
1/26/2010 12:55:02 PM
Creation date
10/12/2006 12:17:38 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8220.101.10.E
Description
Glen Canyon Dam/Lake Powell
State
AZ
Basin
Colorado Mainstem
Date
4/1/1998
Author
Sorensen/et al. - Ar
Title
Monitoring and Habitat Surveys of the Endangered Kanab Ambersnail in Grand Canyon and Northern Arizona
Water Supply Pro - Doc Type
Report/Study
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<br />Arizona Game and Fish Department <br />NGTR 125: Kanab Ambennail Report <br /> <br />April 1998 <br />Page 5 <br /> <br />REsULTS <br /> <br />MONITORING <br />In 1997, interagency KAS mooitoring at VP was conducted in March, May, August, and October. <br />Habitat l'l:COVtJ.'y below the 45,000 cfs (1275 m3ts) stage at VP continued slowly (Table 2). After <br />the lasl19 months, the tolal area oflow zone habitat is 34.8% less than the pre-flood, March 1996 <br />level. Higher than normal flows (20,000 to 27,000 cfs [566 to 764 m3ts]) during the summer <br />combined with a series of flash floods from the Paria River (25.7 Ian downstream of Glen Canyon <br />Dam) have prevented habitat restoration in the low vegetation patches (below 30,000 cfs [849 <br />m3ts] stage). <br /> <br />. <br />;:; <br />, <br />., <br /> <br />Table 2. Kanab ambersnail habitat distribution at Vaseys Paradise, 1995-97 (Stevens et al. <br />1997a. 1997b' Sorensen and Kublv 1997. and unDublished data). <br />Survey Delee lUbilat Ama (m') lUbiIat A.- (m') Total PotediaJ HabiW III <br />(lIIOIIIhIyMr) < 1275 m'l. Ilap > 1275 m'I.1lap Vuey. PandUe (n?) <br />Man:h 1995 125.1 187.0 312.1 <br />J_ 1995 146.2 220.4 366.6 <br />~ 1995 105.6- lSl).0* 355.6 <br />Man:h 1996 119.4. 199.9 319.3. <br />April 1996 55.0. 194.0. 249.0. <br />May 1996 50.2 > 144.5 >194.7 <br />J_ 1996 47.8. 129.1. 176.9. <br />~--1996 70.5. 142.9. 213.4. <br />Oclober 1996 81.5 145.8 227.3 <br />March 1997 57.1.. 189.9.. 247.0.. <br />May 1997 69.8.. 201.9.. 271.6.. <br />......... 1997 86.9". 197 .3.. 284.2.. <br />Oclober 1997 n.9.. 204.5.. 305.7.. <br />lUbilat ClUaorW 00IIIbilk, plIIcboo of MimMJIu, ~. IDlI mixeI of OANWVI.'Y vocellllion u ... IUIIl. Total <br />pnt-uol hobillll CCIIIbiDe low (< 1275 m'I.) IDlI upper (> 1275 m'I.) vopllllion ZOIIOI (DOt iDc1udiDi obliquo <br />pbotoJtUIIIDeIrY ",""-e."" of m..-..ible plIIcboo). "R8viIod cllIIa from SIeV_ et aI. (1997.). ..Unpubliabod cllIIa <br />are ..-aimn..'Y IDlI subject \0 reviaion. <br /> <br />~ <br />~, <br />f- <br />,. <br /> <br />1: <br /> <br />'0 <br />'. <br />" <br />'e <br />f~ <br />(-: <br />.:.; <br /> <br />" <br />~( <br /> <br />r.o: <br /> <br />j". <br /> <br />~ <br /> <br />" <br />. <br />. <br />,., <br />I..,' <br />? <br />~ <br />.' <br />~ <br />~I <br />;'i <br />~:l <br />~, <br />", <br /> <br />, <br />
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