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Hawaii Pacific GIS Conference 2012: Engineering and Public Works - GIS Applications in Geotechnical (Soils) & Environmental Engineering
 

Hawaii Pacific GIS Conference 2012: Engineering and Public Works - GIS Applications in Geotechnical (Soils) & Environmental Engineering

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    Hawaii Pacific GIS Conference 2012: Engineering and Public Works - GIS Applications in Geotechnical (Soils) & Environmental Engineering Hawaii Pacific GIS Conference 2012: Engineering and Public Works - GIS Applications in Geotechnical (Soils) & Environmental Engineering Presentation Transcript

    • GIS Applications in Geotechnical (Soils) & Environmental Engineering Hawaii Pacific GIS Conference 2012 March 7, 2012 Elise Leroux, Associate 1
    • Geotechnical Consulting 2
    • Slope stability study, nearHāwī, Big Island 3
    • Dam safety study, Kaua‛i Geotechnical investigation, Mauna Lani, Big Island 4
    • Compaction testingon new waterline,Moloka‛i Mass grading for housing at Ford Island, O‛ahu 5
    • Pile driving, ArizonaMemorial Visitor Center,Pearl Harbor Geotechnical test pit for Waimānalo Stream restoration 6
    • What does this have to do with GIS? 7
    • Maps for Project Reports
    • Location maps 9
    • Geologicmapping 10
    • Geologicmapping;differing soils 11
    • Historicgeologicmapping 12
    • Soilmapping 13
    • Maps for Field Investigations
    • Mapping sample locations –Step 1: layout points based on plan 15
    • Mapping sample locations –Step 2: georeference plan 16
    • Mapping sample locations –Step 3: remove plan 17
    • Mapping sample locations –Step 4: add coordinates; grid 18
    • Example on large project 19
    • Historical Landforms and Planned Construction 20
    • Map depictingformer sump and boring locations 21
    • Location 22
    • Georeference historical map 23
    • 24
    • 25
    • 26
    • 27
    • 28
    • 29
    • 30
    • 31
    • 32
    • 33
    • 34
    • 35
    • 36
    • 37
    • Georeference historical photo 38
    • 39
    • 40
    • Approximate the boundary based on historical maps & photos 41
    • Overlay site plan 42
    • Map book for road design 43
    • 44
    • 45
    • 46
    • 47
    • 48
    • Hydrology and hydrogeology 49
    • Slope stabilization,Nu‛uanu Stream,O‛ahu Sheet piling, Middle Street, Honolulu 50
    • Stormwater Runoff and GIS 51
    • Calculating runoff to plan forconstruction 52
    • 53
    • Surface water hydraulic analysis Problem: stormwater washing out road during construction Who is responsible for extra costs? 54
    • Analysis procedure Map problem areas Map contributing drainage area(s) for each Calculate design flow for each drainage area Calculate design drainage for each problem area  Based on road linear foot 55
    • 56
    • 57
    • Analysis continued Calculate flows from actual storm Compare with design flows (design was greater) Estimate necessary size of diversion structures Compare with original design 58
    • 59
    • Environmental Consulting Environmental sampling at Kalaeloa, O‛ahu 60
    • Environmental Investigations Direct push drilling for groundwater contamination investigation, Waikīkī 61
    • Environmentalsoil sampling,Hanua Street,Kapolei 62
    • DETERMINING SAMPLE LOCATIONS 63
    • 64
    • 65
    • Mapping sample locations 66
    • 67
    • Environmental PermittingExcavation thatwill requiredewatering,Honolulu Zoo,Waikīkī 68
    • Environmental Permitting 69
    • Environmental Permitting 70
    • Environmental Planning 71
    • ROCKFALLS 72
    • Boulder problem 73
    • 74
    • From whose land did it come? 75
    • Step 1: Map possible source basedon contours 76
    • Georeference historical image 77
    • Georeferencing is imprecise Nature of aerial imagery from low-flying aircraft  Distortion away from flightline Vast changes in landscape & development  Few tie-points 78
    • This one is better due to increasedtie-points 79
    • Multiple historical images may help 80
    • Landowners 81
    • Analysis Boulder came from state land Unclear if it was from land previously “worked” Recommend field investigation  May be possible to determine exact location  Can assess future hazards 82
    • IMAGES FOR COMMUNITY MEETINGS 83
    • Rock slide investigation,Koko Crater, O‛ahu 84
    • 85
    • Boulder investigation,Koko Crater, O‛ahu 86
    • Images for community presentations $Boulder locations & elevationsKoko Crater Rock Fall Investigation,April 2009 87
    • Rock slide probable path $ 88
    • 89
    • Rock slide probable path$ 90
    • Rock slide probable path$ 91
    • QUESTIONS? 92
    • Mahalo! Contact info: Elise Leroux eleroux@masafujioka.com tel. (808) 484-5366 Masa Fujioka & Associates98-021 Kamehameha Hwy #337 Aiea, HI 06701 93