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Home My WebLink AboutAPPENDIX A APPENDIX A HABITAT SURVEY DATA COLLECTION & SUMMARY TABLES AND GRAPHS Table 1: Data collected at the habitat unit level for habitat surveys for main stem habitats. UNITS DESCRIPTION DROPDOWNS UNITS fk_Survey Unique Survey Number - - pk_Units Unique Unit Number - - DateCreated Date Surveyed - DD/MM/YYYY DateModified Date Modified - DD/MM/YYYY GPS_Top_Lat GPS coordinate taken from the Bad Elf GNSS Surveyor - DD GPS_Top_Long GPS coordinate taken from the Bad Elf GNSS Surveyor - DD GPS_Top_EPE GPS coordinate taken from the Bad Elf GNSS Surveyor - - GPS_Bottom_Lat GPS coordinate taken from the Bad Elf GNSS Surveyor - DD GPS_Bottom_Long GPS coordinate taken from the Bad Elf GNSS Surveyor - DD GPS_Bottom_EPE GPS accuracy taken from Bad Elf GNSS Surveyor - - ChannelType MS Channel type Main channel, braid, side channel - UnitNumber Non-unique sequential unit number for survey - - UnitType_Dominant Unit type as defined by Bouwes et al. 2011, Units must be at least one wetted width in length and occupy 50% of the wetted width. Pool, riffle, glide, ponded area, backwater - PoolType Pool type as defined by hydrology (Bisson et al. 1982) Plunge pool, scour pool, trench pool, dammed pool, backwater pool - PoolFormingFeature Feature causing scour and pool formation LW Piece, LW jam, boulder, bedrock, beaver dam, confluence, channel bend - UnitType_SubDominant A subdominant unit must be at least one wetted width in length Pool, riffle, glide, ponded area, end point, backwater - SubDomUnitPercent Percentage of channel occupied by the subdominant unit - % UnitLength Total wetted length of unit - m UnitWidth25 Wetted width at 25% of unit length - m UnitWidth50 Wetted width at 50% of unit length (taken for pond units) - m UnitWidth75 Wetted width at 75% of unit length - m Comments - - - NoJamsPresent - Y/N - NoLWDPiecesPresent - Y/N - Table 2: Data collected for edges unit level for habitat surveys for main stem habitat types. EDGES DESCRIPTION DROPDOWNS UNITS fk_Units Unique Unit Number - - pk_Banks Unique bank identifier - - DateCreated Date Surveyed - DD/MM/YYYY DateModified Date Modified - DD/MM/YYYY Bank Left or right bank Left, right - EdgeType Edge habitat as defined by Hayman et al. (1996) Bar edge, natural bank edge, other, hydro-modified bank edge, riprap bank edge, levee bank edge, placed LW, deflectors, pilings - EdgeLength Percent of channel unit length occupied by each edge type for left and right bank. 1-100 (increments of 10) % SlowWater Presence of slow water next to bank. Y/N - SlowWater_EdgeWidth Width of slow water next to edge. - m Table 3: Data collected for large wood for each unit for habitat surveys for Main stem habitats. Large wood was only recorded if a qualifying piece of the jam was wetted at the time of the survey. LWD DESCRIPTION DROPDOWNS UNITS fk_Units Unique Unit number - - pk_LWD Unique LW piece identifier - - DateCreated Date Surveyed - DD/MM/YYYY DateModified Date Modified - DD/MM/YYYY LWDJamNum Count of LW jam located within the wetted channel or within 10m of distance and 1m of vertical elevation from the wetted edge - - JamLength Visually estimated length of the jam. - m JamWidth Visually estimated width of the jam. - m JamUnitCoverPercent Percent of the jam that is wetted. - - Table 4. Main stem habitats surveyed in the Middle Hoh River Study Area by reach from September 28th to October 1st, 2020 at an average daily flow of 1,614 to 2,652 cubic feet per second (cfs) at the Highway 101 bridge (USGS Gage 12041200). The count of observed units is n; length (feet) and area (square feet) are totals for the channels. Edge length (feet) and slow water area (square feet) are totals for all edges. Braid and side-channel habitats were surveyed as time allowed and were not a full census of habitats. Na indicates the habitat did not exist; ns indicates the habitat did exist but was not surveyed due to time constraints. REACH CHANNEL TYPE UNIT TYPE TOTAL BAR EDGE HYDRO-MODIFIED BANK EDGE NATURAL BANK EDGE EDGES N LENGTH AREA EDGE LENGTH SLOW WATER AREA EDGE LENGTH SLOW WATER AREA EDGE LENGTH SLOW WATER AREA EDGE LENGTH SLOW WATER AREA Oxbow Canyon Main Channel Glide 5 5,023 733,819 2,395 7,858 0 0 7,651 31,990 10,046 39,848 Pool 8 3,271 420,589 2,500 11,582 0 0 4,042 16,641 6,542 28,223 Rapid 1 574 170,473 172 565 0 0 976 3,202 1,148 3,767 Riffle 4 1,099 179,703 1,099 4,575 0 0 1,099 3,606 2,198 8,181 Morgan’s Crossing Main Channel Glide 12 14,403 2,839,300 15,001 65,495 1,181 4,650 12,624 42,491 28,806 112,636 Pool 5 2,746 365,961 2,746 17,082 787 2,583 1,959 6,426 5,492 26,092 Riffle 13 7,427 1,486,321 9,232 49,071 0 0 5,621 22,734 14,853 71,805 Backwater 2 787 34,914 787 2,583 0 0 787 2,583 1,575 5,167 Total 32 25,363 4,726,496 27,767 134,232 1,969 7,233 20,991 74,234 50,726 215,700 Braid Glide 20 3,946 233,661 6,577 27,128 0 0 1,314 4,312 7,891 31,439 Pool 19 2,276 130,114 3,059 10,036 0 0 1,492 4,896 4,551 14,932 Riffle 26 3,168 143,422 5,385 19,733 0 0 952 3,834 6,337 23,567 Total 65 9,389 507,197 15,020 56,896 0 0 3,759 13,042 18,779 69,938 Side Channel Glide 5 1,457 79,232 1,511 4,958 0 0 1,404 4,605 2,915 9,563 Pool 12 2,733 210,829 2,358 8,515 0 0 3,107 10,193 5,465 18,707 Riffle 13 1,423 62,827 1,445 4,741 0 0 1,401 4,596 2,846 9,337 Backwater 1 66 850 66 215 0 0 66 215 131 431 Total 31 5,678 353,739 5,380 18,429 0 0 5,977 19,609 11,357 38,037 Total 128 40,431 5,587,431 48,167 209,557 1,969 7,233 30,726 106,885 80,862 323,675 Spruce Canyon Main Channel Glide 2 2,014 424,981 1,260 4,133 0 0 2,769 14,122 4,029 18,256 Pool 4 3,268 487,390 102 1,001 377 1,238 6,056 25,876 6,535 28,115 Rapid 2 1,883 254,674 1,693 5,553 0 0 2,074 8,266 3,766 13,819 Riffle 2 1,886 298,833 492 3,229 0 0 3,281 20,828 3,773 24,057 Total 10 9,052 1,465,878 3,546 13,917 377 1,238 14,180 69,092 18,104 84,247 Braid Glide 0 0 0 0 0 0 0 0 0 0 0 Pool 0 0 0 0 0 0 0 0 0 0 0 Rapid 1 472 48,050 472 3,100 0 0 472 1,550 945 4,650 Riffle 0 0 0 0 0 0 0 0 0 0 0 Total 1 472 48,050 472 3,100 0 0 472 1,550 945 4,650 Side Channel Glide ns ns ns ns ns ns ns ns ns ns ns Side Channel Glide ns ns ns ns ns ns ns ns ns ns ns Pool ns ns ns ns ns ns ns ns ns ns ns Rapid ns ns ns ns ns ns ns ns ns ns ns Riffle ns ns ns ns ns ns ns ns ns ns ns Total ns ns ns ns ns ns ns ns ns ns ns Total 11 9,524 1,513,928 4,019 17,017 377 1,238 14,653 70,642 19,049 88,897 Huelsdonk-South Fork Main Channel Glide 10 1,545,778 471,153 8,192 46,036 741 2,433 7,707 35,033 16,640 83,502 Pool 13 1,084,475 330,548 5,924 26,750 1,182 3,877 5,748 35,806 12,854 66,434 Riffle 13 956,417 291,516 7,458 31,685 1,733 5,684 4,812 17,660 14,003 55,029 Total 36 3,586,670 1,093,217 21,574 104,471 3,656 11,994 18,267 88,500 43,497 204,965 Braid Glide 36 251,175 76,558 9,801 42,468 151 495 3,723 15,454 13,675 58,417 Pool 44 241,536 73,620 6,353 39,715 0 0 4,033 13,982 10,386 53,698 Riffle 71 431,849 131,628 16,640 59,936 0 0 3,377 13,239 20,017 73,175 Backwater 2 4,821 1,469 433 1,421 0 0 112 366 545 1,787 Total 153 929,381 283,275 33,227 143,540 151 495 11,245 43,041 44,623 187,076 Side Channel Glide 34 276,367 84,237 5,447 31,108 115 377 7,640 36,303 13,201 67,789 Pool 40 325,878 99,328 4,800 19,928 276 2,809 6,974 25,399 12,049 48,136 Riffle 35 277,716 84,648 5,387 22,450 0 0 4,781 16,744 10,168 39,194 Backwater 3 1,209 369 0 0 0 0 313 1,027 313 1,027 Total 112 881,170 268,581 15,633 73,487 390 3,186 19,708 79,473 35,732 156,145 Total 301 61,926 5,397,221 70,435 321,498 4,197 15,675 49,221 211,014 123,852 548,187 Total 545 151,974 17,849,913 166,618 732,405 10,661 37,656 126,669 532,949 303,948 1,303,010 Table 5. Pool counts, reach width (feet), total pool area (square feet), the percent of area in pools, pool frequency (pools per mile), and pool spacing (channel widths per pool) (Montgomery et al. 1995) for all channel types and reaches for the Hoh River main stem from surveys conducted from September 28th to October 1st, 2020 at an average daily flow of 1,614 to 2,652 cfs at the Highway 101 bridge (USGS Gage 12041200). Braid and side-channel habitats were surveyed as time allowed and were not a full census of habitats. Na indicates the habitat did not exist; ns indicates the habitat did exist but was not surveyed. REACH CHANNEL TYPE TOTAL POOLS REACH WIDTH POOL AREA % POOL AREA POOLS/ MILE CHANNEL WIDTHS/ POOL Oxbow Canyon Main Channel 8 147 420,589 28 4.2 8.5 Braid na na na na na Na Side Channel na na na na na Na Total 8 147 128,196 28 4.2 8.5 Willoughby Creek Main Channel 5 159 284,765 9 1.5 21.8 Braid 20 41 140,569 25 10.3 12.5 Side Channel 3 77 87,661 40 6.2 11.2 Total 28 71 512,995 13 4.9 15.1 Morgan’s Crossing Main Channel 5 167 365,961 8 1 30.4 Braid 19 43 130,114 26 10.7 11.5 Side Channel 12 49 210,829 60 11.2 9.6 Total 36 75 706,904 13 4.7 14.9 Spruce Canyon Main Channel 4 156 487,390 33 2.3 14.5 Braid na 102 na na na Na Side Channel na - na na na Na Total 4 151 487,390 32 2.2 15.8 Huelsdonk-South Fork Main Channel 13 159 1,084,475 30 3.2 10.5 Braid 44 33 241,536 26 10.4 15.4 Side Channel 40 39 325,878 37 11.8 11.5 Total 97 50 1,651,889 31 8.3 12.7 Grand Total 173 65 3,779,766 21 6.0 13.6 Table 6. Counts (n) and total areas (square feet) large wood jams (LWJ) located in main channel and braids, side channels, and islands, on banks, bars, or islands, and wet or dry from surveys conducted from September 28th to October 1st, 2020 at an average daily flow of 1,614 to 2,652 cfs at the Highway 101 bridge (USGS Gage 12041200). Jams were delineated using aerial imagery collected in March 2021 at a flow of 3,366 cfs at the Highway 101 bridge (USGS Gage 12041200). REACH CHANNEL BANK BAR ISLAND DRY WETTED TOTAL DRY WETTED TOTAL DRY N AREA N AREA N AREA N AREA N AREA N AREA N AREA Oxbow Canyon Main channel 0 0 2 4,541 2 4,541 0 0 0 0 0 0 0 0 Total 0 0 2 4,541 2 4,541 0 0 0 0 0 0 0 0 Willoughby Creek Main channel 4 20,431 9 19,249 13 39,680 61 168,310 36 208,936 97 377,247 0 0 Side channel 1 1,319 2 6,566 3 7,884 0 0 0 0 0 0 0 0 Island 0 0 0 0 0 0 0 0 0 0 0 0 1 1,995 Total 5 21,750 11 25,814 16 47,564 61 168,310 36 208,936 97 377,247 1 1,995 Morgan’s Crossing Main channel 15 60,096 15 123,304 30 183,400 70 279,962 32 292,139 102 572,101 0 0 Side channel 0 0 1 1,683 1 1,683 9 23,415 9 38,972 18 62,387 0 0 Island 0 0 0 0 0 0 0 0 0 0 0 0 3 11,167 Total 15 60,096 16 124,987 31 185,083 79 303,377 41 331,111 120 634,488 3 11,167 Spruce Canyon Main channel 2 7,524 3 78,130 5 85,654 5 12,577 1 6,194 6 18,771 0 0 Side channel 0 0 3 30,422 3 30,422 0 0 1 6,546 1 6,546 0 0 Total 2 7,524 6 108,552 8 116,076 5 12,577 2 12,740 7 25,317 0 0 Huelsdonk-South Fork Main channel 7 19,599 19 280,629 26 300,228 93 353,388 50 322,393 143 675,781 0 0 Side channel 6 16,306 15 81,220 21 97,526 17 51,667 5 20,019 22 71,686 0 0 Island 0 0 0 0 0 0 0 0 0 0 0 0 11 24,938 Total 13 35,905 34 361,849 47 397,754 110 405,055 55 342,412 165 747,468 11 24,938 Total 35 125,275 69 625,742 104 751,018 255 889,319 134 895,200 389 1,784,519 15 38,100 Table 7. Counts of large wood jams (n), frequency (LWJ count/mile), total LWJ area (square feet), and mean and median LWJ size (area in square feet; 50th, and 90th percentiles, Jam50, Jam90). Channel lengths were recorded between September 28th to October 1st, 2020 at an average daily flow of 1,614 to 2,652 cfs at the Highway 101 bridge (USGS Gage 12041200). Jams were delineated using aerial imagery collected in March 2021 at a flow of 3,366 cfs at the Highway 101 bridge (USGS Gage 12041200). REACH WET/DRY N LW FREQUENCY TOTAL AREA (FT2) MEAN AREA (FT2) JAM50 JAM90 Oxbow Canyon Dry 0 0.0 0 0 0 0 Wet 2 1.1 4,541 2,270 2,270 2,648 Total 2 1.1 4,541 2,270 2,270 2,648 Willoughby Creek Dry 67 11.7 192,055 2,866 1,995 5,248 Wet 47 8.2 234,751 4,995 2,648 12,129 Total 114 20.0 426,805 3,744 2,283 7,539 Morgan’s Crossing Dry 97 12.7 374,641 3,862 2,647 7,467 Wet 57 7.4 456,098 8,002 5,067 19,639 Total 154 20.1 830,739 5,394 3,135 10,703 Spruce Canyon Dry 7 3.9 20,101 2,872 1,998 4,921 Wet 8 4.4 121,292 15,161 7,922 29,950 Total 15 8.3 141,393 9,426 5,527 15,219 Huelsdonk-South Fork Dry 134 11.4 465,898 3,477 2,641 5,469 Wet 89 7.6 704,261 7,913 3,620 21,724 Total 223 19.0 1,170,159 5,247 2,975 10,347 Hoh MS Study Area Dry 305 10.6 1,052,695 3,451 2,483 6,071 Wet 203 7.1 1,520,942 7,492 3,951 18,876 Total 508 17.6 2,573,637 5,066 2,813 10,202 / Figure 1. The percent of wetted habitat area by habitat unit, channel type, and reach from surveys conducted from September 28th to October 1st, 2020 at an average daily flow of 1,614 to 2,652 cfs at the Highway 101 bridge (USGS Gage 12041200). Braid and side-channel habitats were surveyed as time allowed and were not a full census of habitats, ns indicates the habitat type was present but not surveyed. No braid or side-channel habitat was wetted at the time of survey in the Oxbow Canyon Reach. / Figure 2. Edge length (feet) by edge type, channel type, and reach from surveys conducted from September 28th to October 1st, 2020 at an average daily flow of 1,614 to 2,652 cfs at the Highway 101 bridge (USGS Gage 12041200). Braid and side-channel habitats were surveyed as time allowed and were not a full census of habitats, ns indicates the habitat type was present but not surveyed. No braid or side-channel habitat was wetted at the time of survey in the Oxbow Canyon Reach. / Figure 3. Average slow water edge area (feet) by edge type, and reach from surveys conducted from September 28th to October 1st, 2020 at an average daily flow of 1,614 to 2,652 cfs at the Highway 101 bridge (USGS Gage 12041200). No braid or side-channel habitat was wetted at the time of survey in the Oxbow Canyon Reach. / Figure 4. Pool counts by pool type, channel type, and reach from surveys conducted from September 28th to October 1st, 2020 at an average daily flow of 1,614 to 2,652 cfs at the Highway 101 bridge (USGS Gage 12041200). Braid and side-channel habitats were surveyed as time allowed and were not a full census of habitats, ns indicates the habitat type was present but not surveyed. No braid or side-channel habitat was wetted at the time of survey in the Oxbow Canyon Reach. / Figure 5. Pool counts by pool forming feature, channel type, and reach from surveys conducted from September 28th to October 1st, 2020 at an average daily flow of 1,614 to 2,652 cfs at the Highway 101 bridge (USGS Gage 12041200). Channel feature includes meanders and confluences. Braid and side-channel habitats were surveyed as time allowed and were not a full census of habitats, ns indicates the habitat type was present but not surveyed. No braid or side-channel habitat was wetted at the time of survey in the Oxbow Canyon Reach. / Figure 6. Mean pool frequency (pools per mile) versus wood frequency (LWJ count per mile) of wetted jams pool for reaches in the Hoh River study area with a 95% confidence interval shown. The relationship was not significant, p-value=0.40. Habitat surveys were conducted from September 28th to October 1st, 2020 at an average daily flow of 1,614 to 2,652 cfs at the Highway 101 bridge (USGS Gage 12041200). Jams were delineated using aerial imagery collected in March 2021 at a flow of 3,366 cfs at the Highway 101 bridge (USGS Gage 12041200).