%PDF-1.4 % 1 0 obj << /Type /Pages /Count 1 /Kids [ 2 0 R ] >> endobj 2 0 obj << /Type /Page /Parent 1 0 R /Resources << /ProcSet [ /PDF /Text /ImageB /ImageC /ImageI ] /Font << /QuickPDFF701d5095 67 0 R /QuickPDFF9c2ee522 115 0 R >> >> /Contents [ 5 0 R ] /MediaBox [ 0 0 595.2756 841.8898 ] /CropBox [ 0 0 595.2756 841.8898 ] >> endobj 3 0 obj << /Type /Catalog /Pages 1 0 R /Metadata 116 0 R >> endobj 4 0 obj << /Producer (Debenu Quick PDF Library 11.15 \(www.debenu.com\)) /Creator (Debenu Quick PDF Library 11.15 \(www.debenu.com\)) /CreationDate (D:20190516162300+02'00') /ModDate (D:20190516162300+02'00') >> endobj 5 0 obj << /Length 2682 /LC /iSQP >> stream 0 Tr /QuickPDFF9c2ee522 14 Tf 0 0 0 rg 100 Tz 0 Tw 0 Tc 0 Ts BT 1 0 0 1 66.0498 770.8329 Tm (Detection of Service Pipes and the Risk of Collapsing Sinkholes at the Lake of)Tj 1 0 0 1 98.3338 752.1709 Tm (Constance in Switzerland Using Ground Penetrating Radar \(GPR\))Tj ET /QuickPDFF9c2ee522 11 Tf 0 0 0 rg BT 1 0 0 1 80.3988 717.2179 Tm (Edi Meier, Inma Gutirrez, Marco Baumann, Max Bosshard and Rainer Heeb \(Switzerland\))Tj ET /QuickPDFF9c2ee522 11 Tf 0 0 0 rg BT 1 0 0 1 56.6929 675.188 Tm 14.663 TL (Key words: )' ET /QuickPDFF701d5095 11 Tf 0 0 0 rg BT 1 0 0 1 141.7323 675.188 Tm 14.454 TL (Coastal Zone Management; Engineering survey; Implementation of plans; Land)' (readjustment; Professional practice; Risk management; Spatial planning; sinkholes,)' (erosion, hazard, risk, waste disposal, utility detection, update utility map, nondestructive)' (method, ground penetrating radar GPR, reflectogram)' ET /QuickPDFF9c2ee522 11 Tf 0 0 0 rg BT 1 0 0 1 56.6929 604.3219 Tm 14.663 TL (SUMMARY)' ET /QuickPDFF701d5095 11 Tf 0 0 0 rg BT 1 0 0 1 56.6929 575.9754 Tm 14.454 TL (After a severe winter in Switzerland, two sinkholes opened suddenly on the much used water front of the)' (harbour promenade in Arbon \(Lake of Constance\), following a time span with intensive wind that brought)' (big waves to the shore. The public building authority is responsible for the safety of the boardwalk. They)' (decided not only to search for further sinkholes but also to document the present underground condition. This)' (will be used for the forthcoming restauration work. In order to get a precise underground documentation of)' (the area a Ground Penetrating Radar \(GPR\) survey was executed. This nondestructive method gives as a)' (result images of the subsurface structures as well as of installations like service pipes. The underground)' (structure of the port facilities is clearly shown in the radar images \(reflectograms\).)' ()' (For the city council of Arbon this radar documentation is a helpful tool for the emergency decisions as well)' (as for the planning of the future lakeshore constructions.)' ET /QuickPDFF701d5095 10 Tf 0 0 0 rg BT 1 0 0 1 56.6929 163.8497 Tm 13.14 TL (__________________________________________________________________________________________)' ()' (Detection of Service Pipes and the Risk of Collapsing Sinkholes at the Lake of Constance in Switzerland Using Ground)' (Penetrating Radar \(GPR\) \(10010\))' (Edi Meier, Inma Gutirrez, Marco Baumann, Max Bosshard and Rainer Heeb \(Switzerland\))' ()' (FIG Working Week 2019)' (Geospatial information for a smarter life and environmental resilience)' (Hanoi, Vietnam, April 2226, 2019)' ET endstream endobj 6 0 obj << /Length 316 /Filter /FlateDecode >> stream xMRKnCAۿSpk`y^Uu[jIɒT%C/:b}Rx\%=
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