american samoa - University of Hawaii at Manoa Botany Department

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TABLE 10-10 (CONTINUED)FIELD MONITORING WORKSHEETAMERICAN SAMOA WETLAND RESTORATION AND ENHANCEMENT PLANASILI STREAMPAGE 3 of 3 PAGESCHANGES IN STREAM CHANNEL TRAPEZOID7 For each trapezoid represented below, measure the distances between 1) Points A and B,2) Points C and D, and 3) Points E and F. Write in the measurement on each trapezoid.Station Asili Stream Station Asili Stream1+ 00 E 8+ 00 EA B A BC D C DFF2 + 00 E 9+ 00 EA B A BC D C DFF3 + 00 E 10+ 00 EA B A BC D C DFF4 + 00 EABCFD5 + 00 EABCFD6 + 00 EABCFD7 + 00 EABCFD
Vehicular and pedestrian access to selected monitoring stations is largely dependent upon thecooperation and authorization of local residents and the Asili Village Council. Assuming thatresidents cooperatively permit periodic access for long-term resource monitoring, fieldmonitoring should begin at station 1+00 and continue upstream to station 10+00 (Figure 10-3).Recommended monitoring stations or sites should be used consistently unless unanticipatedevents, new land uses, or access issues prevent continued use. When necessary, changes in thelocation of monitoring stations should be documented and spatially located within theAmerican Samoa GIS.PPC has provided digital files for the Wetland and Stream Restoration and Enhancement Planthat provide a departure point for locating future resource monitoring area along lower AsiliStream.Photographs made during field monitoring should be incorporated into the digital photo albumdeveloped by PPC in conjunction with the Wetland/Stream Restoration and Enhancement Plan.This will enable a long-term comparison of resource information.Measurements should also be made of the stream trapezoid to more specifically quantifychanges in stream hydrology. In essence, these measurements would be made at the samecross-section stations (stations 1+00 through 10+00) used for this study (Figure 10-2 and Table10-10):More specific monitoring of stream fauna should be made approximately 150 feet upstream ofthe Asili Stream mouth. Such monitoring should include the collection of driftnet samples ofoutgoing larvae, at least two times per month, for 3-4 hour evening periods. The driftnets (150-200 ųm mesh) should be attached to rebar pounded into the stream substrata, or simplysuspended from trees or bridges to that the net is at the surface of the water. The sampleswould subsequently be preserved in ethanol. The type and number of fish and crustaceansshould be enumerated using a dissecting microscope. Use of the dissecting microscope willlikely require a 2-3 day training class and the necessary equipment.Molluscs should be monitored by mark-recapture methodology, or quadrant counts at nightsince most are primarily nocturnal. Some training in these techniques is recommended.Site MaintenanceThe initial cleanup of lower Asili Stream will represent an important first step toward longtermstream enhancement. However, the initial cleanup is of limited benefit if it is notconnected to the implementation of a long-term maintenance strategy.Periodic site maintenance should take place along lower Asili Stream approximately four timesper year. Household wastes along the 1,000 feet of Asili Stream are expected to represent theprimary focus of long-term site maintenance.A crew of 8 persons will be necessary to periodically collect and remove discarded solid wastematerial from the 1,000-foot segment of Asili Stream. Periodic cleanups would occur shortlyafter significant rainfall and stormwater events. Machetes and weed-eaters will be required toperiodically trim vegetation along selected portions of the stream channel.American Samoa Wetlands/Streams Restoration and Enhancement PlanFebruary 2001, Asili Stream, Page 10-19
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Asili StreamAMERICAN SAMOAWETLAND/S
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American SamoaWetland/Stream Restor
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American Samoa Wetland/Stream Resto
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Page 9 and 10:
Page 11 and 12:
Figure 1-1Location of Potential Wet
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Onsite InvestigationsNovember 1999G
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Where appropriate, stream cross sec
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Chapter TwoTULA WETLANDLOCATIONTula
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Figure 2-2Tula WetlandExisting Cond
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Improved channelization of stormwat
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LAND USES IN THE VICINITY OF TULA W
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Figure 2-3Option 2: Detention of St
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Figure 2-4Option 3: Expansion of Ta
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Comparative Benefits and ImpactsPPC
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TABLE 2-4PRELIMINARY COST ESTIMATEP
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TABLE 2-5LONG-TERM RESOURCE MONITOR
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TABLE 2-6 (CONTINUED)FIELD MONITORI
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Chapter ThreeALAO WETLANDLOCATIONAl
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Figure 3-2Taufusi MarchExisting Con
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Figure 3-3FEMA 100-Year Flood Plain
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East Portion of the MarshThe impact
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WETLAND RESTORATION AND ENHANCEMENT
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The availability of new, blight-res
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Long-Term Monitoring and Site Maint
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TABLE 3-7FIELD MONITORING WORKSHEET
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Recommended monitoring stations or
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Figure 4-1Location MapAoa Village W
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No stream flow estimates are availa
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Fresh-Water SwampThe fresh-water sw
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ecome dominant if there is a nearby
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Relative Abundance and Diversity of
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Option 4: Restore Mangrove Forest U
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TABLE 4-5COMPARATIVE EVALUATIONWETL
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Long-term resource management activ
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• begin at the Tapua Stream mouth
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Figure 5-1Location MapSoutheast Wet
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Tufu Stream and two stream branches
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Mr. Whistler was part of a three-pe
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InvertebratesCrustacean densities w
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FIGURE 5-3OPTION 1: RESTORE RIPARIA
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TABLE 5-4COMPARATIVE EVALUATIONWETL
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Long term monitoring of the Vatia w
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More specific monitoring of stream
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Figure 6-1Location MapVaipito Strea
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Stream FlowsHistorical Stream Flows
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California grass (Brachiaria mutica
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FIGURE 6-3FISH AND INVERTEBRATE SUR
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Most of lower Vaipito Stream segmen
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Red mangrove should be planted with
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TABLE 6-7PRELIMINARY COST ESTIMATEC
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TABLE 6-10 (Continued)FIELD MONITOR
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Vehicular and pedestrian access to
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Figure 7-1Location MapLeele-Papa-Ta
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Stream flow, in some cases, is cons
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Stormwater Discharges and Related F
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AQUATIC FISH AND INVERTEBRATESGener
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Opportunities and StrategiesOption
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Figure 7-3Option 2: Reduction of Er
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TABLE 7-8PRELIMINARY COST ESTIMATEP
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TABLE 7-10 (Continued)FIELD MONITOR
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More specific monitoring of stream
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Figure 8-1Location MapSauino Stream
Page 135 and 136: Stream FlowsHistorical Stream Flows
Page 137 and 138: AQUATIC FISH AND INVERTEBRATESGener
Page 139 and 140: Figure 8-3Option 1: Construction of
Page 141 and 142: FIGURE 8-5OPTION 2: PLANT NATIVE RI
Page 143 and 144: Long-Term Monitoring and Site Maint
Page 145 and 146: TABLE 8-8FIELD MONITORING WORKSHEET
Page 147 and 148: TABLE 8-8 (Continued)FIELD MONITORI
Page 149 and 150: LOCATIONChapter NineLEAFU STREAMLea
Page 151 and 152: Figure 9-2Leone Pala and 300-Foot L
Page 153 and 154: However, during and following heavi
Page 155 and 156: Vegetation TrendsThe lower Leafu St
Page 157 and 158: LAND USES ADJACENT TOLOWER LEAFU ST
Page 159 and 160: Option 2: Construct Basaltic Wall,
Page 161 and 162: Figure 9-5:Stabilize East Stream Ba
Page 163 and 164: TABLE 9-7PRELIMINARY COST ESTIMATEP
Page 165 and 166: TABLE 9-8LONG-TERM RESOURCE MONITOR
Page 167 and 168: TABLE 9-9 (Continued)FIELD MONITORI
Page 169 and 170: Chapter TenASILI STREAMLOCATIONAsil
Page 171 and 172: Figure 10-2Asili Stream SegmentExis
Page 173 and 174: Stormwater Discharges and Related F
Page 175 and 176: Further downstream, the stream chan
Page 177 and 178: TABLE 10-4SUMMARY OF MACROFAUNAL OR
Page 179 and 180: American Samoa Wetlands/Streams Res
Page 181 and 182: CLEAN-UP OF LOWER ASILI STREAMLABOR
Page 183 and 184: TABLE 10-9LONG-TERM RESOURCE MONITO
Page 185: TABLE 10-10 (Continued)FIELD MONITO
Page 189 and 190: Figure 11-1Location MapFusi Wetland
Page 191 and 192: WETLAND VEGETATIONNovember 1999 Sur
Page 193 and 194: The lack of stream flow entering th
Page 195 and 196: Figure 11-3Option 1: Remove Solid W
Page 197 and 198: Recommended Option and Estimated Pr
Page 199 and 200: TABLE 11-6FIELD MONITORING WORKSHEE
Page 201 and 202: Any future monitoring stations or s
Page 203 and 204: Project ManagerRepresentatives of a
Page 205 and 206: REFERENCESBiosystems Analysis, Inc.
Page 207 and 208: APPENDIX ASUMMARY OFPLANTSOBSERVED
Page 209 and 210: Species Family EnglishNameSamoanNam
Page 213: APPENDIX CSUMMARY OFAQUATIC MACROFA
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