Looking Glass River Watershed Management Plan - Greater ...
Looking Glass River Watershed Management Plan - Greater ... Looking Glass River Watershed Management Plan - Greater ...
Table 5-1 Status of Designated Uses Designated Use Status Location Stressor Based On Summers Drain Sediment and Altered Hydrology Fair benthic macroinvertebrate scores (FOLGR); observations (MDEQ 2005); streambank erosion problems (roadstream crossing surveys); and lack of buffer (road-stream crossing surveys) Faiver Drain. Sediment and Altered Hydrology Embeddedness problem (road-stream crossing surveys); and lack of buffer (road-stream crossing surveys) Remy-Chandler Drain Sediment and Altered Hydrology Fair to poor benthic macroinvertebrate scores (FOLGR); observations (MDEQ 2005); embeddedness problems (roadstream crossing surveys); disturbed ground noted adjacent to drain (roadstream crossing surveys); and lack of buffer (road-stream crossing surveys) Turkey Creek Drain Sediment and Embeddedness problem (road-stream Warmwater Fisheries and Altered Hydrology crossing surveys); and lack of buffer Other Aquatic Life and Threatened (road-stream crossing surveys) Wildlife Mud Creek Sediment and Embeddedness problem (road-stream Altered Hydrology crossing surveys); and lack of buffer (road-stream crossing surveys) Vermillion Creek Sediment and Altered Hydrology Fair benthic macroinvertebrate scores (FOLGR); embeddedness problem (road-stream crossing surveys); and lack of buffer (road-stream crossing surveys) Looking Glass River Sediment and Altered Hydrology Fair benthic macroinvertebrate scores (FOLGR, MDEQ, MidMEAC); poor habitat scores (MDEQ); embeddedness problems (road-stream crossing surveys); disturbed ground noted adjacent to drain (road-stream crossing surveys); and lack of buffer (roadstream crossing surveys) Navigation Threatened Looking Glass River Periodic tree Observations from canoe trips blockage Fish Consumption Impaired Lakes, reservoirs, and impoundments Mercury MDCH statewide fish consumption advisory for mercury contamination. 5-2 Looking Glass River Watershed April 2007
Determining Significant Stressors A wide range of data and information are available on the Looking Glass River watershed. Review and analysis of recent data from studies and reports, also summarized in Section 3, helped to determine the most significant pollutants and stressors specifically in the subwatershed. Based on all of the data analyzed, the status of designated uses and related stressors, and the general stressor list, it has been determined that the most significant stressors in the subwatershed (and the most appropriate to address at this scale) include the following: • Sediment; • Altered Hydrology; Included in this section is a summary of the major pollutants or stressors that are adversely affecting the watershed. A stressor is defined as a stimulus that causes stress. Stress in the environment is caused by the presence of unfavorable external factors such air and land pollutants, impervious surfaces and lack of undisturbed land. Two primary stressors are identified within this watershed and include: altered hydrology and sediment. For each of these stressors, detailed information is provided on the sources, impacts, impairments, indicators, water quality standards, available data, improvement or protection goals, critical areas, how to monitor progress and ideas for improvement. Sediment Sediment in urban watersheds is an important pollutant; causing problems and negative impacts while furthermore transporting other pollutants that bind to sediment particles. Quantitatively, sediment has been labeled the most important single pollutant in U.S. streams and rivers. Inorganic fine sediments are naturally present to some extent in all streams. However, in the last half century, excessive sediment of anthropogenic origin has caused enormous damage to streams throughout North America (Waters, T.F. 1995). Sediment transported by moving water is described by the terms “suspended load” and “bedload.” The suspended load is comprised by the fraction of material that is mixed intimately with the flowing water and tends to make the water appear muddy. The suspended load may be further segregated to include the suspended solids and the dissolved solids. Suspended solids will settle through the water based on its own density given an opportunity, however is often sporadically and repeatedly caught in local turbulent eddies and remains suspended. The bedload is comprised of the larger particles too heavy to be suspended, but rather pushed along near the streambed. (Leopold, 1994). All streams require a degree of bedload transport to maintain their pools, riffles, and meanders. Some substrate movement is beneficial because it allows fine sediment to be flushed out of the spaces between larger particles and ultimately downstream. However, if there is too much substrate movement, the channel may be too unstable to support healthy fish and invertebrate populations. Section 5: Stressor Summary 5-3
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- Page 78 and 79: Sources The main sources of sedimen
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Determining Significant Stressors<br />
A wide range of data and information are available on the <strong>Looking</strong> <strong>Glass</strong><br />
<strong>River</strong> watershed. Review and analysis of recent data from studies and<br />
reports, also summarized in Section 3, helped to determine the most<br />
significant pollutants and stressors specifically in the subwatershed.<br />
Based on all of the data analyzed, the status of designated uses and related<br />
stressors, and the general stressor list, it has been determined that the most<br />
significant stressors in the subwatershed (and the most appropriate to<br />
address at this scale) include the following:<br />
• Sediment;<br />
• Altered Hydrology;<br />
Included in this section is a summary of the major pollutants or stressors that<br />
are adversely affecting the watershed. A stressor is defined as a stimulus<br />
that causes stress. Stress in the environment is caused by the presence of<br />
unfavorable external factors such air and land pollutants, impervious<br />
surfaces and lack of undisturbed land.<br />
Two primary stressors are identified within this watershed and include:<br />
altered hydrology and sediment. For each of these stressors, detailed<br />
information is provided on the sources, impacts, impairments, indicators,<br />
water quality standards, available data, improvement or protection goals,<br />
critical areas, how to monitor progress and ideas for improvement.<br />
Sediment<br />
Sediment in urban watersheds is an important pollutant; causing problems<br />
and negative impacts while furthermore transporting other pollutants that<br />
bind to sediment particles. Quantitatively, sediment has been labeled the<br />
most important single pollutant in U.S. streams and rivers. Inorganic fine<br />
sediments are naturally present to some extent in all streams. However, in<br />
the last half century, excessive sediment of anthropogenic origin has caused<br />
enormous damage to streams throughout North America (Waters, T.F. 1995).<br />
Sediment transported by moving water is described by the terms<br />
“suspended load” and “bedload.” The suspended load is comprised by the<br />
fraction of material that is mixed intimately with the flowing water and<br />
tends to make the water appear muddy. The suspended load may be further<br />
segregated to include the suspended solids and the dissolved solids.<br />
Suspended solids will settle through the water based on its own density<br />
given an opportunity, however is often sporadically and repeatedly caught<br />
in local turbulent eddies and remains suspended. The bedload is comprised<br />
of the larger particles too heavy to be suspended, but rather pushed along<br />
near the streambed. (Leopold, 1994).<br />
All streams require a degree of bedload transport to maintain their pools,<br />
riffles, and meanders. Some substrate movement is beneficial because it<br />
allows fine sediment to be flushed out of the spaces between larger particles<br />
and ultimately downstream. However, if there is too much substrate<br />
movement, the channel may be too unstable to support healthy fish and<br />
invertebrate populations.<br />
Section 5: Stressor Summary 5-3
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