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  1. page isleta edited ... Adapted from MRGESCP (2008) (Exhibits 2-12, 2-13, 2-14). Lateral Connectivity ... Rio Gran…
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    Adapted from MRGESCP (2008) (Exhibits 2-12, 2-13, 2-14).
    Lateral Connectivity
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    Rio Grande.
    and so on...
    Considering the discharges that have been observed at the ages in the reach (Figures 8, 9, 10), and their location within the reach (RM 164, RM 141, and RM 131, respectively) indicate that there is little overbanking. Figure 12 indicates that overbanking is expected to occur at 3,000 cfs between RM 166 and 165, RM 147 and 145, and RM 144 and 143. The mean flows since at least 1970 indicate that flows do not regularly exceed this amount through the Isleta Reach. Therefore, RGSM habitat, in most years, is limited to the main channel or directly adjacent to it.
    Figure12Figure 12. Overbank Flooding in the Isleta Reach, New Mexico.
    {Isleta Reach, Overbank Flooding.png}
    (view changes)
    2:52 pm
  2. page isleta edited ... {USGS 08331510 RIO GRANDE AT STATE HWY 346 NEAR BOSQUE, NM.png} Annual discharge statistics …
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    {USGS 08331510 RIO GRANDE AT STATE HWY 346 NEAR BOSQUE, NM.png}
    Annual discharge statistics from USGS, 2014. National Water Information System: Web Interface. [Online] Available at: http://waterdata.usgs.gov/nwis.
    ...
    discharge in late Aprillate-April through early Julyearly-July (Figure 9).
    Figure10Figure 10.
    USGS gage 08332010, Rio Grande Floowdway near Bernardo, NM - mean flow (cfs).
    {USGS 08332010 RIO GRANDE FLOODWAY NEAR BERNARDO, NM.png}
    Annual discharge statistics from USGS, 2014. National Water Information System: Web Interface. [Online] Available at: http://waterdata.usgs.gov/nwis.
    The period of record at gage # 08332010 is longer than the other gages in the reach (Figure 10). The 34-, 15-, and 5-year averages show that the amount of water flowing through this gage is decreasing, and that spring flows may be increasing earlier in the year. In the last 5 years, flows at this gage have averaged at or near 0 cfs, intermittently, between Day 201 and 301 (late-August to late-November). This may indicate river drying in the area of this gage, or lower flows, that negatively impact the longitudinal connectivity (i.e. fish and eggs successfully travelling downstream) and lateral connectivity (i.e. availability of instream, side channel, and floodplain RGSM habitat) of the Isleta Reach.
    Longitudinal Connectivity
    The upstream and downstream extents of the Isleta Reach are defined by the Isleta Diversion and San Acacia Diversion Dams (respectively), inhibiting longitudinal connectivity of the Rio Grande. RGSM eggs have been observed throughout the river to drift downstream more than 150 km, but can also settle in low-velocity areas near spawning sites (Medley & Shirey, 2013). Portions of the Isleta Reach are prone to drying during heavy water withdrawals and dry years, limiting longitudinal connectivity further. In particular, MRGESCP (2008) identifies increased drying potential beginning between River Miles (RM) 159 and 160, extending downstream at least as far as RM 153 (Figure 11). The 10-mile segment between the Isleta Diversion Dam, where drying potential is low, and RM 160, leaves little distance for RGSM to spawn and for eggs to drift downstream and entrain in low-velocity habitats. Even as the potential for drying decreases within the 37 miles between RM 151 and the San Acacia Diversion Dam, the channelization of the river can cause RGSM and eggs to flush downstream, without an opportunity to rest or settle in low-velocity areas (MRGESCP, 2008).
    ...
    Adapted from MRGESCP (2008) (Exhibits 2-12, 2-13, 2-14).
    Lateral Connectivity
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    the channel. In the current system, limited overbanking into the floodplain may provide the only habitat that is available for RGSM. Figure 12 shows areas that potentially overbank at specific flows in the Rio Grande.
    and so on...
    FigureFigure12Figure 12. Overbank
    {Isleta Reach, Overbank Flooding.png}
    Adapted from MRGESCP (2008) (Exhibits 4-5, 4-6, 4-7).
    ...
    The 2003 FWS Biological Opinion (BO) describes Reasonable and Prudent Alternatives (RPAs) to avoid the likelihood of jeopardizing RGSM and SWFL, an d of adversely affecting RGSM habitat (FWS, 2003b).
    Opportunities for RGSM
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    MRG indicate thethat there is a need to
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    the main channelchannel, if itthe hydrograph is extended.
    Discussion//Caveats
    There are a number of factors, outside the scope of habitat restoration, that prevent the complete restoration of the Rio Grande to conditions that were present before Spanish imperialist occupation, or even before construction of Cochiti Dam (the northernmost extent of critical habitat for RGSM). In the current Rio Grande system, full habitat restoration is complicated by the extinction of several native aquatic species, as well as development of current technical/engineered, economic, and legal systems in the historic floodplain (MRGESCP, 2004). Further, all observations and studies of RGSM life history and ecology have taken place within current conditions and it's contemporary range. Since the current conditions of RGSM are complicated by anthropogenic development of the floodplain, these observations can lead to a misunderstanding of the RGSM's real habitat preferences and needs (MRGESCP, 2004). Further, low population density and patchy distribution, and a small number of sampling sites, prevent reliable estimates of the RGSM's current population (MRGESCP, 2004).
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    2:42 pm
  3. page isleta edited ... Fish Movement The U.S. Geological Survey (USGS) has installed three stream gages in the Islet…
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    Fish Movement
    The U.S. Geological Survey (USGS) has installed three stream gages in the Isleta Reach above San Acacia Diversion Dam. Focusing on macrohabitat conditions for RGSM, Figures 8, 9, and 10 show annual averages of discharge at these gages.
    FigureFigure8Figure 8. USGS
    {USGS 08331160 RIO GRANDE NEAR BOSQUE FARMS, NM.png}
    Annual discharge statistics from USGS, 2014. National Water Information System: Web Interface. [Online] Available at: http://waterdata.usgs.gov/nwis.
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    and June (Day
    Figure
    (day 75 and 151 of the year) (MRGESCP, 2008). Figure 8 indicates that 6 or 7 year average at U.S. Geologial Survey (USGS) gage # 08331160 has increased spring flows in late April through late early July.
    Figure9Figure
    9. USGS
    {USGS 08331510 RIO GRANDE AT STATE HWY 346 NEAR BOSQUE, NM.png}
    Annual discharge statistics from USGS, 2014. National Water Information System: Web Interface. [Online] Available at: http://waterdata.usgs.gov/nwis.
    FigureAt USGS gage # 08331510, the 7-year average discharge is similar, with increased discharge in late April through early July (Figure 9). Compared to gage # 08331160, flows are about 150 cfs lower.
    Figure10Figure
    10.
    USGS gage 08332010, Rio Grande Floowdway near Bernardo, NM - mean flow (cfs).
    {USGS 08332010 RIO GRANDE FLOODWAY NEAR BERNARDO, NM.png}
    (view changes)
    1:41 pm
  4. page isleta edited ... Fish Movement The U.S. Geological Survey (USGS) has installed three stream gages in the Islet…
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    Fish Movement
    The U.S. Geological Survey (USGS) has installed three stream gages in the Isleta Reach above San Acacia Diversion Dam. Focusing on macrohabitat conditions for RGSM, Figures 8, 9, and 10 show annual averages of discharge at these gages.
    ...
    near Bosque Forms,Farms, NM -
    {USGS 08331160 RIO GRANDE NEAR BOSQUE FARMS, NM.png}
    Annual discharge statistics from USGS, 2014. National Water Information System: Web Interface. [Online] Available at: http://waterdata.usgs.gov/nwis.
    The RGSM spawning period is between April and June (Day
    Figure 9. USGS gage 08331510, Rio Grande at Sate Highway 346 near Bosque, NM - 7-year mean flow (cfs).
    {USGS 08331510 RIO GRANDE AT STATE HWY 346 NEAR BOSQUE, NM.png}
    Annual discharge statistics from USGS, 2014. National Water Information System: Web Interface. [Online] Available at: http://waterdata.usgs.gov/nwis.
    The RGSM spawning period is between
    Figure 10.
    USGS gage 08332010, Rio Grande Floowdway near Bernardo, NM - mean flow (cfs).
    {USGS 08332010 RIO GRANDE FLOODWAY NEAR BERNARDO, NM.png}
    Annual discharge statistics from USGS, 2014. National Water Information System: Web Interface. [Online] Available at: http://waterdata.usgs.gov/nwis.
    (view changes)
    1:20 pm
  5. page isleta edited ... Rio Grande Silvery Minnow Habitat Conditions in the Isleta Reach Fish Movement ... stream …
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    Rio Grande Silvery Minnow Habitat Conditions in the Isleta Reach
    Fish Movement
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    stream gages in the Isleta Reach above San Acacia Diversion Dam. Focusing on macrohabitat conditions for RGSM, Figures 8, 9, and 10 show annual averages of discharge at these gages.
    Figure 8. USGS gage 08331160, Rio Grande near Bosque Forms, NM - 6-year mean flow (cfs).
    {USGS 08331160 RIO GRANDE NEAR BOSQUE FARMS, NM.png}
    ...
    {USGS 08331510 RIO GRANDE AT STATE HWY 346 NEAR BOSQUE, NM.png}
    Annual discharge statistics from USGS, 2014. National Water Information System: Web Interface. [Online] Available at: http://waterdata.usgs.gov/nwis.
    The RGSM spawning period is between
    Figure 10.
    {USGS 08332010 RIO GRANDE FLOODWAY NEAR BERNARDO, NM.png}
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    12:55 pm
  6. 11:24 am
  7. page isleta edited ... Rio Grande Silvery Minnow Edward McCorkindale, MWP and MPA Candidate focusing in Hydroscien…
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    Rio Grande Silvery Minnow
    Edward McCorkindale, MWP and MPA Candidate
    focusing in Hydroscience and Dispute Resolution
    www.unm.edu/~emccorkindale
    Professional Profile
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    Fish Movement
    The U.S. Geological Survey (USGS) has installed three stream gages
    ...
    USGS gage 08331510,08331160, Rio Grande at Sate Highway 346 near Bosque,Bosque Forms, NM - 7 year6-year mean flow (cfs).
    {USGS 0833151008331160 RIO GRANDE AT STATE HWY 346 NEAR BOSQUE,BOSQUE FARMS, NM.png}
    Figure

    Annual discharge statistics from USGS, 2014. National Water Information System: Web Interface. [Online] Available at: http://waterdata.usgs.gov/nwis.
    Figure
    9. USGS gage 08331510, Rio Grande at Sate Highway 346 near Bosque, NM - 7-year mean flow (cfs).
    {USGS 08331510 RIO GRANDE AT STATE HWY 346 NEAR BOSQUE, NM.png}
    Annual discharge statistics from USGS, 2014. National Water Information System: Web Interface. [Online] Available at: http://waterdata.usgs.gov/nwis.
    Figure 10.
    {USGS 08332010 RIO GRANDE FLOODWAY NEAR BERNARDO, NM.png}
    Annual discharge statistics from USGS, 2014. National Water Information System: Web Interface. [Online] Available at: http://waterdata.usgs.gov/nwis.
    Longitudinal Connectivity
    The upstream and downstream extents of the Isleta Reach are defined by the Isleta Diversion and San Acacia Diversion Dams (respectively), inhibiting longitudinal connectivity of the Rio Grande. RGSM eggs have been observed throughout the river to drift downstream more than 150 km, but can also settle in low-velocity areas near spawning sites (Medley & Shirey, 2013). Portions of the Isleta Reach are prone to drying during heavy water withdrawals and dry years, limiting longitudinal connectivity further. In particular, MRGESCP (2008) identifies increased drying potential beginning between River Miles (RM) 159 and 160, extending downstream at least as far as RM 153 (Figure 11). The 10-mile segment between the Isleta Diversion Dam, where drying potential is low, and RM 160, leaves little distance for RGSM to spawn and for eggs to drift downstream and entrain in low-velocity habitats. Even as the potential for drying decreases within the 37 miles between RM 151 and the San Acacia Diversion Dam, the channelization of the river can cause RGSM and eggs to flush downstream, without an opportunity to rest or settle in low-velocity areas (MRGESCP, 2008).
    ...
    Sogge, M.K., Ahlers, Darrell, & Sferra, S.J., 2010, A natural history summary and survey protocol for the Southwestern willow flycatcher: U.S. Geological Survey Techniques and Methods 2A-10, 38 p.
    Sublette, J.E., Hatch, M.D., Sublette, M., 1990. The fishes of New Mexico. Albuquerque, NM: University of New Mexico Press.
    ...
    of Reclamation. http://www.usbr.gov/uc/albuq/envdocs/ea/mrg/IsletaReach/http://www.usbr.gov/uc/albuq/envdocs/ea/mrg/IsletaReach/.
    U.S. Geological Survey (USGS), 2014. National Water Information System: Web Interface. [Online] Available at: http://waterdata.usgs.gov/nwis [Accessed 4 May 2014].

    (view changes)
    11:23 am

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