| APPENDIX B | |||||||||||||||||||||||||||||||||||||||||
| Drainage | Map ID | Station # | slope | Channels (l or r) | Deposit | Channel | Boulders (med, 75, 90) | D 99 | D 99 | D 99 | D99 | Nominal Diam | Superelevation | Superelevation | Velocity | Velocity | Comments-Detailed Notes | ||||||||||||||||||||||||
| Field Book | (degrees) | flow depth (l) | flow depth (r) | thickness | width | Median | 75% | 90% | A-axis | B-axis | C-axis | Volume | Cube-Sphere | Velocity | (Costa's) | (Clarke) | |||||||||||||||||||||||||
| (m) | (m) | (m) | (m) | (m) | (m) | (m) | (m) | (m) | (m) | (cubic m) | (m) | (degrees) | (m/s) | (m/s) | cube-sphere | ||||||||||||||||||||||||||
| (m/s) | |||||||||||||||||||||||||||||||||||||||||
| Camuri | |||||||||||||||||||||||||||||||||||||||||
| Chiquito | |||||||||||||||||||||||||||||||||||||||||
| 4-4-1 | 1 | 3.8-4.0 | 6 | 4.5 | 95.3 | 0.2 | |||||||||||||||||||||||||||||||||||
| 4-4-2 | 1.1 | 2.5-3.0 | 5.1 | 4.1 | 2 | 41.8 | 3.47-4.31 | 10.3 | 6.7-7.4 | both schist and gneiss boulders; largest gneiss boulder carried in matrix | |||||||||||||||||||||||||||||||
| 4-4-3 | 1.2 | 2.5 | 0.4-0.5 | bus buried with windows intact; laminar deposition around bus; boulders supported by coarse sandy pebbly matrix | |||||||||||||||||||||||||||||||||||||
| 4-4-4 | 1.21 | 2.9 | new debris flow terrace (min. thk 2.9 m) cut by subsequent flood | ||||||||||||||||||||||||||||||||||||||
| 4-4-5 | 1.22 | debris flow (12/17) from lateral channel depositing atop main channel deposits | |||||||||||||||||||||||||||||||||||||||
| 4-4-6 | 1.3 | 3 | 7.8 | 7.6 | 5 | 296.4 | 6.67-8.27 | 14 | 9.2-10.2 | moved onto top of old house foundation | |||||||||||||||||||||||||||||||
| 1.3 | 11.3 | 5 | 3.5 | 197.75 | 5.83-7.23 | 11.4 | 8.6-9.5 | upchannel from previous boulder | |||||||||||||||||||||||||||||||||
| 4-4-7 | 1.4 | 4.5-5.0 | 3.0-4.0 | 1.0-3.0 | imbricated boulders (1-3 m) in matrix; df deposit over flood deposit | ||||||||||||||||||||||||||||||||||||
| 4-4-8 | 2 | 8 | 5.5 | 78 | 2.0-3.0 | 5.8 | evidence of a sequence of 3 events: top to bottom- coarse df, finer grained df, flood flow with fine deposition | ||||||||||||||||||||||||||||||||||
| 4-4-9 | 2.1 | 4.5 | 4.5 | 1.5 | 12 | 8.2 | 2.4 | 236.2 | 6.18-7.67 | 14.5 | 8.8-9.8 | boulder deposited with top df event; old df exposed at base of channel with 1.5 m max boulders overlain by brownish red soil | |||||||||||||||||||||||||||||
| 4-4-10 | 2.2 | 7.5 | 1 | 10 | 4.7 | 3.5 | 164.5 | 5.48-6.8 | 11.1 | 8.3-9.25 | gneiss boulder; high concentration of large boulders with 1-m average dimension; about 10% larger clasts | ||||||||||||||||||||||||||||||
| 4-4-11 | 3 | 4.0-5.0 | 7 | 12 | 54 | some large (old) boulders not removed from bottom of channel; some deposition of boulders | |||||||||||||||||||||||||||||||||||
| 4-4-12 | 3.1 | 6 | 6 | 9 | 27.4 | major tributary debris flow channel | |||||||||||||||||||||||||||||||||||
| 4-4-13 | 3.2 | 13-14 | 16 | 10 | 17.4 | landslide blocked channel more likely than than superelevation | |||||||||||||||||||||||||||||||||||
| 4-4-14 | 3.3 | 5.0-6.0 | 9 | 8 | 26 | 1 | |||||||||||||||||||||||||||||||||||
| San Julian (channel) | |||||||||||||||||||||||||||||||||||||||||
| 7-10-1 | 7/10/01 | 5 | 3.5 | 3.5 | 172 | 3.1 | 2.6 | 1 | 8.1 | 2.01-2.49 | 8.3 | 5.2-5.7 | gneiss boulder | ||||||||||||||||||||||||||||
| 7-10-1 | 3.6 | 3 | 1.2 | 13 | |||||||||||||||||||||||||||||||||||||
| 7-10-2 | 7/10/02 | 3.0-3.5 | 1.7 | 181 | 2.5 | ||||||||||||||||||||||||||||||||||||
| 7-10-2 | 7/10/02 | 3.0-3.5 | 7 | 0.5 | sequence of 3 old depsoits 7-m-thick capped by new | ||||||||||||||||||||||||||||||||||||
| 7-10-3 | 7/10/03 | 3.5-5 | 3 | 111 | 5.3 | 2.7 | 1.9 | 27.2 | 3.00-3.73 | 8.4 | 6.3-6.9 | gneissic boulder matrix supported | |||||||||||||||||||||||||||||
| 7-10-3 | 5.9 | 3.3 | 1.5 | 29.2 | 3.08-3.82 | 9.3 | 6.3-7.0 | gneissic boulder matrix supported | |||||||||||||||||||||||||||||||||
| 4-5-1 | 3.4 | 2.5 | 0.75 | ||||||||||||||||||||||||||||||||||||||
| 7-10-4 | 7/10/04 | 4.0-5.0 | 3.0-6.0 | 135 | 6.3 | 2 | 1.9 | 23.9 | 2.88-3.58 | 7.3 | 6.1-6.8 | dark gneissic boulder in a sandy gravelly matrix | |||||||||||||||||||||||||||||
| 7-10-4 | 4.4 | 2.6 | 1.8 | 20.6 | 2.74-3.40 | 8.3 | 6.0-6.6 | ||||||||||||||||||||||||||||||||||
| 4-5-2 | 3.5 | 3 | 1.0-2.0 | in depositional central part of channel; upchannel from S2 | |||||||||||||||||||||||||||||||||||||
| 4-5-3 | 3.6 | 3 | 2.5 | 1 | |||||||||||||||||||||||||||||||||||||
| 4-5-4 | 4 | 2.5-3.5 | 1.5 | 75 | 2 | ||||||||||||||||||||||||||||||||||||
| 4-5-5 | 5 | 2.0-3.0 | |||||||||||||||||||||||||||||||||||||||
| 4-5-6 | 6 | 3.0-4.0 | 1 | 5.6 | 5.2 | 3.9 | 113.6 | 4.84-6.0 | 11.6 | 7.9-8.7 | |||||||||||||||||||||||||||||||
| 4-5-6 | 6 | 5.5 | 5.2 | 1.6 | 45.76 | 3.58-4.43 | 11.6 | 6.8-7.5 | |||||||||||||||||||||||||||||||||
| 4-5-7 | 6.1 | 14 | 3.0-4.0 | side channel Q. las Choras, debris flow split community of San Julian | |||||||||||||||||||||||||||||||||||||
| 7-10-5 | 7/10/05 | 5.5 | >10 | 129-145 | 3 | 2.1 | 1.5 | 9.5 | 2.11-2.62 | 7.5 | 5.3-5.9 | gneissic boulder | |||||||||||||||||||||||||||||
| 7-10-5 | 4.4 | 4.2 | 2.5 | 46.2 | 3.59-4.45 | 10.5 | 6.8-7.6 | semi-rounded gneissic boulder near centerline of channel | |||||||||||||||||||||||||||||||||
| 7-10-6 | 7/10/06 | 145 | 2.0-3.0 | old debris-flow terrace 17.4 m above present stream level; 8 cm thick carbon-rich layer over df with 2-3 m boudlers at 7.3 m height above present stream level; | |||||||||||||||||||||||||||||||||||||
| 7-10-7 | 7/10/07 | 6 | 11 | 9 | 140 | 4.8 | 1.8 | 1.4 | 12.1 | 2.30-2.85 | 6.9 | 5.5-6.1 | gneissic boulder | ||||||||||||||||||||||||||||
| 4-5-8 | 7 | 5 | 2.6 | 1 | 13 | 2.35-2.92 | 8.3 | 5.6-6.2 | matrix of flow protected under rock; 11 largest boulders measured at this location | ||||||||||||||||||||||||||||||||
| 7-10-8 | 7/10/08 | 5.5-6 | 10.6 | 10.6 | 75 | 3.6 | 2.3 | 1.9 | 15.7 | 2.51-3.11 | 7.8 | 5.7-6.4 | gneissic boulder at constriction of channel | ||||||||||||||||||||||||||||
| 7-10-9 | 7/10/09 | 4 | 71 | 3.5 | many boulders > 3m on upper bench | ||||||||||||||||||||||||||||||||||||
| 7-10-10 | 7/10/10 | 6.0-6.5 | 5 | 98 | 2.5 | 6 | 5.3 | 1.8 | 57.2 | 3.85-4.78 | 11.7 | 7.0-7.8 | old df terrace on east side of channel with D90= 2.5 m of semi-rounded gneiss about 5-6 m above present channel | ||||||||||||||||||||||||||||
| 7-10-11 | 7/10/11 | 5.5 | 6 | 131 | 6.9 | 4.1 | 2.9 | 82 | 4.35-5.39 | 10.3 | 7.5-8.3 | gneiss boulder | |||||||||||||||||||||||||||||
| 4-5-9 | 8.05 | 3.5 | 1.0-2.0 | islands of rocky debris flow deposits left incised 2-3 m deep by subsequent flooding | |||||||||||||||||||||||||||||||||||||
| 7-10-12 | 7/10/12 | 5.0-6.0 | 4 | 113 | 1.5 | ||||||||||||||||||||||||||||||||||||
| 4-5-10 | 8.1 | 4 | 5 | 12 | 4 | 71 | 2.0-3.0 | sequence of recent df, flood, df exposed in 4-m thick section over old df deposits; channel eroded to schist bedrock; middle of drainage filled with blocky debris; 4 degree slope on top surface of debris flow deposit | |||||||||||||||||||||||||||||||||
| 7-10-13 | 7/10/13 | 5 | 5 | 4 | 90-94 | 9.5 | 5.9 | 2.6 | 145.7 | 5.26-6.53 | 12.3 | 8.2-9.1 | dark banded gneiss boulder supported in matrix;boulder plucked out from nearby outcrop | ||||||||||||||||||||||||||||
| 7-10-13 | 7/10/13 | 5 | 6.2 | 5.8 | 4 | 143.8 | 5.24-6.50 | 12.2 | 8.2-9.1 | old boulders in df matrix | |||||||||||||||||||||||||||||||
| 7-10-13 | 7/10/13 | 5 | 7.2 | 6.6 | 3.8 | 180.6 | 5.65-7.01 | 13 | 8.5-9.4 | old boulders in df matrix | |||||||||||||||||||||||||||||||
| 4-5-11 | 9 | intact island of old df deposits with recent debris flow deposits atop in middle of channel; slightly raised bedrock bench on one side of channel; steep north-dipping bedrock foliation | |||||||||||||||||||||||||||||||||||||||
| 7-10-14 | 7/10/14 | 4.0-4.5 | 12.5 | 4 | 96 | 3.4 | 2.7 | 1.6 | 14.7 | 2.45-3.04 | 8.4 | 5.7-6.3 | much higher trim line from flood (12.5 m) than from debris flow; augen gneiss boulder | ||||||||||||||||||||||||||||
| 7-10-15 | 7/10/15 | 4.5 | 0.5 | 55 | mostly erosional scour in narrow channel; only thin deposition remaining on high terrace | ||||||||||||||||||||||||||||||||||||
| 4-5-12 | 10 | 2.0-3.0 | 3 | 3 | 95 | 10.4 | 8.4 | 4.8 | 419.3 | 7.48-9.29 | 14.7 | 9.7-10.7 | moved (?)-all sides of boulder appear fresh, unweathered; some parts of boulder covered by fresh deposits | ||||||||||||||||||||||||||||
| 7-10-16 | 7/10/16 | 3.5-4.5 | 12 | >2 | 66 | 8.4 | 6.4 | 3.2 | 172 | 5.56-6.90 | 12.8 | 8.4-9.3 | 2-m new deposit atop old terrace | ||||||||||||||||||||||||||||
| 4-5-13 | 11 | 6.0-7.0 | 6 | at stream junction 2 separate debris flows; 1st df from 6-7 degree eastern (main) channel had largest boulders; later 2nd df down 15 degree channel crossed, ranup opposite slope, temporarily blocked channel; sandy matrix beneath blocks deposited across 2nd channel | |||||||||||||||||||||||||||||||||||||
| 4-5-14 | 11 | 15.0 | 1.5 | 2 | debris flow runup on opposite side of junction of tributaries; imbricated larger boulders over inclined (5 degrees) sandy pre-event (?) surface | ||||||||||||||||||||||||||||||||||||
| 4-5-15 | 11 | 6.0-7.0 | 5 | 2.5 | large incised bouldery debris-flow deposit just below junction of tributaries | ||||||||||||||||||||||||||||||||||||
| 7-10-17 | 7/10/17 | 7 | 1.0-3 | 40 | 14.6 | 13.8 | 6.5 | 1309.6 | 10.9-13.57 | 18.7 | 11.6-12.9 | old very rounded gneiss at edge of channel;recent deposit of 1-3 m thickness plastered against old df terrace | |||||||||||||||||||||||||||||
| 7-11-1 | 7/11/01 | 6-6.5 | 8.7 | 1-1.5 | 49 | at tributary channel to west; erosional zone, very little (1.0-1.5 m deposition); old 5-m thick df terrace of angular-semi-rounded gneiss about 9-m above present channel | |||||||||||||||||||||||||||||||||||
| 7-11-2 | 7/11/02 | 16 | 7 | 5 | 4 | 140 | 5.19-6.44 | 11.4 | 8.1-9.0 | steep side channel (fault zone?) near main channel of Q. San Julian | |||||||||||||||||||||||||||||||
| 7-11-3 | 7/11/03 | 4.5-7.0 | 10.9 | 1 | 43 | step-like irregular topography with bedrock in channel; mostly erosional section | |||||||||||||||||||||||||||||||||||
| 7-11-4 | 7/11/04 | 12.5 | 31 | 8.2 | 5.9 | 4 | 193.5 | 5.78-7.18 | 12.3 | 8.6-9.5 | semi-rounded boulder of augen gneiss; eyewitness reports that this area was terrace with mangrove trees; pot hole eroded into bedrock indicating previous exposure | ||||||||||||||||||||||||||||||
| 7-11-5 | 7/11/05 | 5.0-7.0 | 7.3 | 31 | 18.4 | 11.5 | 3.5 | 740.6 | 9.05-11.23 | 17.1 | 10.6-11.8 | large rock moved and jammed into place in steep scoured section with irregular slope surface | |||||||||||||||||||||||||||||
| 7-11-6 | 7/11/06 | 10 | 34 | 2 | old rounded boulder in exposed df terrace 14-m high; multiple bedrock steps in channel | ||||||||||||||||||||||||||||||||||||
| 7-11-7 | 7/11/07 | 8.5 | 12.7 | 40 | 1.5 | main channel completely clean exposing bedrock; side channels choked with boulders; df terraces exposed with semi-rounded boulders | |||||||||||||||||||||||||||||||||||
| 7-11-8 | 7/11/08 | 10.0-14.0 | 12 | ||||||||||||||||||||||||||||||||||||||