american samoa - University of Hawaii at Manoa Botany Department

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TABLE 8-4RELATIVE ABUNDANCE AND DIVERSITY OF FISH AND INVERTEBRATESLOWER SAUINO STREAM SEGMENTFishes Crustaceans MolluscsAbundance Low None LowDiversity Low None LowSource: Pedersen Planning Consultants, 2000LAND USES ADJACENT TOLOWER SAUINO STREAMThe lower Sauino Stream segment is situatedwithin a low-density residential area ofNuuuli Village. Approximately five singlefamily homes are constructed immediatelyadjacent to the north and south banks of thestream. One smaller banana plantation islocated along the south side of the 600-foot,stream channel segment.RIPARIAN RESTORATION AND ENHANCEMENT OPPORTUNITIESGeneralTwo opportunities were identified for the restoration and enhancement of lower Sauino Streamsegment. The scope of these restoration and enhancement opportunities, and relatedimplementation strategies, are presented in the following paragraphs. The potential benefitsand impacts derived from the implementation of the recommended strategies are subsequentlyevaluated and compared in the following paragraphs.Preliminary cost estimates are presented for the implementation of the recommended strategy.Long-term monitoring and site maintenance requirements associated with the recommendedstrategy are also identified.Opportunities and StrategiesOption 1: Construct a Detention PondOption 1 would incorporate the 600-foot stream segment within a larger, 9.1-acre detentionpond area (Figure 8-3). The intent of this option would primarily be to detain largerstormwater flows that can occasionally inundate portions of the adjoining residential area andreduce the amount of sediment discharge into Pala Lagoon. Secondarily, the project objectivewould be to establish more wetland vegetation in the vicinity of lower Sauino Stream.However, no new vegetation would be planted along the 600-foot stream segment.Construction of the detention area would initially require the excavation of the project area tothe 2.5-foot contour. Roughly five to six feet of soil would be excavated from the proposeddetention area.A five to six-foot high way would be constructed along the perimeter of the detention pond.The pond perimeter would extend approximately 4,250 feet. The wall would be constructedthrough the use of small bags of cement that would be hand-carried and placed along the pondperimeter. The maximum slide slope of the pond interior would contain a 4:1 slope.American Samoa Wetlands/Streams Restoration and Enhancement PlanFebruary 2001, Sauino Stream, Page 8-7
Figure 8-3Option 1: Construction of Detention PondAmerican Samoa Wetlands/Streams Restoration and Enhancement PlanFebruary 2001, Sauino Stream, Page 8-8
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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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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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TABLE 4-9FIELD MONITORING WORKSHEET
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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
Page 87 and 88: Long term monitoring of the Vatia w
Page 89 and 90: TABLE 5-8FIELD MONITORING WORKSHEET
Page 91 and 92: More specific monitoring of stream
Page 93 and 94: Figure 6-1Location MapVaipito Strea
Page 95 and 96: Stream FlowsHistorical Stream Flows
Page 97 and 98: California grass (Brachiaria mutica
Page 99 and 100: FIGURE 6-3FISH AND INVERTEBRATE SUR
Page 101 and 102: Most of lower Vaipito Stream segmen
Page 103 and 104: Red mangrove should be planted with
Page 105 and 106: TABLE 6-7PRELIMINARY COST ESTIMATEC
Page 107 and 108: TABLE 6-9LONG-TERM RESOURCE MONITOR
Page 109 and 110: TABLE 6-10 (Continued)FIELD MONITOR
Page 111 and 112: Vehicular and pedestrian access to
Page 113 and 114: Figure 7-1Location MapLeele-Papa-Ta
Page 115 and 116: Stream flow, in some cases, is cons
Page 117 and 118: Stormwater Discharges and Related F
Page 119 and 120: AQUATIC FISH AND INVERTEBRATESGener
Page 121 and 122: Opportunities and StrategiesOption
Page 123 and 124: Figure 7-3Option 2: Reduction of Er
Page 125 and 126: TABLE 7-8PRELIMINARY COST ESTIMATEP
Page 129 and 130: TABLE 7-10 (Continued)FIELD MONITOR
Page 131 and 132: More specific monitoring of stream
Page 133 and 134: Figure 8-1Location MapSauino Stream
Page 135 and 136: Stream FlowsHistorical Stream Flows
Page 137: AQUATIC FISH AND INVERTEBRATESGener
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 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 and 186: TABLE 10-10 (Continued)FIELD MONITO
Page 187 and 188: Vehicular and pedestrian access to
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Figure 11-1Location MapFusi Wetland
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WETLAND VEGETATIONNovember 1999 Sur
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The lack of stream flow entering th
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Figure 11-3Option 1: Remove Solid W
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Recommended Option and Estimated Pr
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TABLE 11-6FIELD MONITORING WORKSHEE
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Any future monitoring stations or s
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Project ManagerRepresentatives of a
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REFERENCESBiosystems Analysis, Inc.
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APPENDIX ASUMMARY OFPLANTSOBSERVED
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Species Family EnglishNameSamoanNam
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APPENDIX CSUMMARY OFAQUATIC MACROFA
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