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WSP07923
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Last modified
1/26/2010 2:29:26 PM
Creation date
10/12/2006 2:40:24 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 monitoring at VP was conducted in March, May, August, and October. <br />Habitat recovery below the 45,000 cfs (1275 m3ts) stage at VP continued slowly (Table 2). After <br />the 1asl19 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 Faria 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 ambersnai1 habitat distribution at Vaseys Paradise, 1995-97 (Stevens et al. <br />1997a 1997b: Sorensen and Kublv 1997. and unpublished data), <br />Survey nllee lUbilat Ama (m') lUbiIat Ama (m') Total PoteotiaJ HabiW U <br />(lIIODIhIyMr) < 1275 m'J. Ilap > 1275 m'J.1lap Vuey. PandiIe (n?) <br />March 1995 125.1 1S7.0 312.1 <br /> J_ 1995 146.2 220.4 366.6 <br />~ 1995 105.6- lSl).o- 355.6 <br />March 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.S. 129.1. 176.9. <br />~--1996 70.5. 142.9. 213.4. <br />0cI0bet 1996 S1.5 145.S 227.3 <br />March 1997 57.1.. 1S9.9.. 247.0.. <br /> May 1997 69.S.. 201.9.. 271.6.. <br />AuguIt 1997 86.9". 197.3.. 284.2.. <br />0cI0bet 1997 n.9.. 204.5.. 305.7.. <br />lUbilat ClIteaon- COIDbilk. pUcIIOI of MimMJIu. Na#IIrriIutI, IDlI mixeI of 0ANWVL.<y vocelalion u """ IUIIl. Total <br />pnt.-;.I hobilat combine low (< 1275 m'J.) IDlI upper (> 1275 m'J.) voplalion ZOIIOI (not inc1udini oblique <br />pbotoJtUDIDeIrY -n-.."" of m.~.iblo pUcIIOI). "RoviIod claIa from Stev_ et aI. (1997.). ..Unpubliabod claIa <br />are prodimn...<y IDlIlUbjoct to reviaion. <br /> <br />r. <br />l <br />t- <br />o' <br />'- <br />~, <br /> <br />-' <br />, <br /> <br />~':' <br />" <br /> <br />:'\ <br />" <br />f~ <br />(-~. <br />,,~ <br /> <br />.> <br />-:. <br /> <br />r.... <br /> <br />j". <br /> <br />~, <br />.', <br />. <br />. <br />." <br />~..! <br />~ <br />,. <br />-7.~ <br />~': <br />~' <br />;;.. <br />j,iS <br />f1 <br />*..1 <br /> <br />", <br /> <br />-,;,;" <br />
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