# A: Formalities. DELOS WP 1.1 Inventory on LCS, questionnaire, detailed description, revision D AUTH GR. Participant code and who to contact.

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1 A: Formalities Participant code and who to contact. AUTH GR J. Avgeris This date (today, mm:dd:yyyy) and revision number (A..Z). 17/09/01 Rev A Location of LCS. Patras Gulf, west side Hotel Akti Lakkopetra Start date, length and/or end of works. Have there been any later changes? If so, when? Start in Construction period, 4 months approx. No further change. Design life - the minimum length of time the beach management scheme is designed to last. 50 years Which tools and regulations are used for the design formulae (mathematical models, model tests, engineering experience, standards, recommendations). Mathematical models, engineering experience and international literatute recommendations. Who fund the work (e.g. Public Administration or private company)? Private company Costs drs (1991)

2 B: Geometry and construction materials B1 System layout (aerial view) Are shore attaching structures present (e.g. groins)? Yes No Are emerging head islands present? Yes No The following sketch concerns only shore parallel LCS; if the layout is different you must insert another sketch and specify parameters like the ones suggested. If a picture is available please insert it too. L G Contour at sea bed/crest level C L D LCS LCS LCS Shoreline at MSL The typical layout is given at Sea Bed (index SB) and at Crest Level (index CL). D Distance from shoreline 125 meters L SB Length of LCS at sea bed 85 meters L CL Length of LCS at crest level 67 meters G SB Gap between LCS at sea bed 25 meters G CL Gap between LCS at crest level 43 meters n Number of LCS in system 3 Remarks: See attached drawings B2 Bathymetry of sea bed and beach Please insert a dimensioned sketch if possible. Description of bathymetry when LCS were build Is detailed information (measurements) available? If so, please explain. 2-3 % slope, uniform. Detailed sea bed soundings were available. B3 Trunk cross section/contour geometry outer profile If shore attached structures perpendicular to shoreline are present, please insert a sketch with typical longitudinal section and typical selected cross sections. Specify parameters as the ones given below.

3 If the layout does not fit the following sketch please insert another sketch. BTS BSS BCL BSL BTL Seaward face lcl 1 1 Landward face αss αsl αbs l BS les lts ltl lbl l EL α BL α BS Steepness of sea bed, seaward 2,5 % α BL Steepness of sea bed, landward 2,5 % α SS Steepness of slope, seaward 2:1 α SL Steepness of slope, landward 3:2 l BS Level of sea bed at seaward toe - 3,3 meters l ES Level of excavation, seaward - meters l TS Level of toe, seaward - meters l CL Level of crest + 0,7 meters l BS Level of sea bed at landward toe - 3,0 meters l ES Level of excavation, landward - meters l TS Level of toe, landward - meters B TS Width of toe, seaward - meters B SS Width of slope, seaward 7,0 meters B CL Width of crest 3,0 meters B SL Width of slope, landward 5,0 meters B TL Width of toe, landward - meters Remarks (e.g. different layout along shoreline, other important parameters). B4 Round head contour geometry Rectangular Intermediate Circular

4 B5 Description of layers What is the shape of the round head? Rectangular Intermediate Circular Please insert a dimensioned sketch with the typical cross-section composition. For each layer, please provide the following information. ARMOUR LAYER CHARACTERISTICS ( 2 x D50 ) Material (e.g. quartzite, concrete) Quarry rock Shape of blocks (e.g. quarry rock, sea stones, cubes) Quarry rock ρ r Mass density of material 2650 kg/m 3 D n50 Nominal diameter 1,0 meter Gr Grading of the material (D 85 /D 15 ) Tons Geotextile between layers? Yes No Remarks (e.g. details on geotextile) 2 nd layer formed by quarry rock kg (Weight of armoring/10) Core layer formed by filling 0.1 to 100 kg. For more details see attached drawings. B6 Construction method How have the stones been placed? Dumped with barges Placed with barges Land based operation Other: Sequence of operation. Construction started upstream Construction started downstream

5 C: Local meteomarine conditions at the structure C1 Waves φ LCS H S Design significant wave height 2,4 meters T P Design peak period 6,2 seconds φ Design wave incidence angle 0 degree Remarks (provide information on wave statistics and wave spectra if available, e.g. H S corresponding to return periods 1 month, 1 y, 10 y, 50 y. Please specify the source of the data) Return period = 1 year Source: Wave hintcasting analysis C2 Water levels TIDAL WATER LEVEL VARIATIONS HAT Highest astronomical tide level meters MHWL Mean tide high water level meters MWL Mean water level meters MLWL Mean tide low water level meters LAT Lowest astronomical tide level meters Water level statistics (If available, please provide information on design water level and tide and surge generated water levels corresponding to return periods 1 month, 1 y, 10 y, 50 y) C3 Current Tidal currents Description & statistics if available Surge generated currents Description & statistics if available (e.g. mean velocities as function of water depth/distance to shore line)

6 D: Sea bed and beach characteristics, incl. sediment transport Description of the coast (e.g. bar type coast with gentle slope or plane coast with steep slope) Bar type coast with gentle slope D1 Natural sea bed material at surface Parameter Description of sea bed material Fill in box unit Material (e.g. quartzite) ρ r Mass density of material kg/m 3 D n50 Nominal diameter grain size meters Gr Grading of the material (D 85 /D 15 ) Remarks (provide grain distribution if available) D2 Natural beach material at surface Parameter Description of beach material Fill in box unit Material (e.g. quartzite) ρ r Mass density of material kg/m 3 D n50 Nominal diameter grain size meters Gr Grading of the material (D 85 /D 15 ) Natural supply? Yes No Supplied by beach nourishment? Yes No Remarks (provide grain distribution if available) D3 Artificial beach nourishment Description of nourishment Parameter Description of artificial nourishment Fill in box unit Material (e.g. quartzite) ρ r Mass density of material kg/m 3 D n50 Nominal diameter meters Gr Grading of the material (D 85 /D 15 )

7 Remarks (provide grain distribution if available) D4 Sediment transport Description of the sediment transport (e.g. direction and amount of transport, distribution over the coastal profile) Parameter Description of sediment Fill in box unit Material (e.g. quartzite) ρ r Mass density of material kg/m 3 D n50 Nominal diameter meters Gr Grading of the material (D 85 /D 15 ) E: Structural performance E1 Definition of failure modes Seaward shoulder damage Seaward toe damage Crest lowering Core settlement Rear shoulder damage Rear toe damage Sea bed scour at seaward toe Subsoil settlement Sea bed scour at rear toe Please insert a sketch with dimensions of LCS cross-section when it was build compared to the appearance now (like the figure of failure modes) if possible. In the following please specify damages by failure mode (see figure of failure mode definition) and amount of damage. If you know the reason for the problems/failures (e.g. extreme wave climate/water level), please type it in the description boxes. E2 Materials Problems caused by deterioration? Yes No Problems caused by breakage? Yes No Description of the condition of the materials E3 Settlement of the structure

8 Description of settlements of core/subsoil (e.g. instabilities in foundation, internal erosion). Please specify settlement in meters. E4 Local erosion of sea bed/scour Description of erosion/scour by roundheads (please specify scour depth) Description of erosion/scour by trunk (please specify scour depth) E5 Erosion and instability of slopes, shoulders, crest and toes Stage of damage No or marginal damage Moderate to severe damage Failure Description of displacements of structural material (provide sketch if possible) E6 Damage parameters The definition of a displaced unit is, when a unit is displaced by more than D n50. Try to give an estimate of the following damage parameters relevant to armour. The relative number of displaced units The strip displacement F: Socio-economic aspects nd (number of displaced units ) D(%) = 100 % Total number of units n d N od =, L is the length of LCS L/ Dn50 What regime of property has the coast at this site? Private, Public full free access, Public limited access, Natural reserve, Don t know, Other (please specify): Who decided that an LCS should be built at that site? Individual, acting for private purpose Individual, acting for public purpose (e.g. Natural park administrator) Local authority (e.g. city council) Regional authority (e.g. province level) National authority (e.g. ministry) Don t know Please give name of the authority whenever applicable:

10 Wildlife watching Intense Moderate Scarce Absent DK Sunbathing and similar Intense Moderate Scarce Absent DK Scuba diving Intense Moderate Scarce Absent DK Sailing and similar Intense Moderate Scarce Absent DK Other (specify) Intense Moderate Scarce Absent DK Has that LCS had an environmental impact assessment before being built? Yes, No, Don t know Could you give its references and location (specify)? Has there been an economic study on that LCS, before it was built? Yes, No, Don t know, References: after it was built? Yes, No, Don t know, References: G: Ecological aspects What are the dominant species on the structures? What are the dominant species in the sediment and fish assemblages around the structures? Were any environmental changes observed follow ing the construction of the structure (e.g. increase of water turbidity, floating algal debris)?

11 H: Coastal protection performance H1 Bathymetry and beach evolution Description of historical beach evolution before LCS was built (10-20 years). Description of beach evolution after LCS was built up to now. H2 Salient formation LCS LCS Present shoreline at MSL D s1 D s2 Shoreline at MSL before LCS B s1 D s1 Max distance between new and old shoreline, seaward meters D s2 Max distance between new and old shoreline, landward meters B s1 Width of salient at old MSL meters H3 Tombolo formation LCS LCS B t1 Present shoreline at MSL D t B t2 Shoreline at MSL before LCS D t Distance between new and old shoreline, landward meters B t1 Minimal width of tombolo meters B t2 Width of tombolo at old MSL meters

12 H4 Renourishment Description of renourishment (add more fill) (e.g. amount, how often) H5 Down drift erosion Please insert a sketch if relevant. Description of down drift erosion (morphological impact, e.g. down drift erosion length and maximal down drift shoreline retreat) I: Problems in general Description of other problems/impacts

13 AUTH_GR_003 Lakopetra, Ahaia Additional data Cross section at the round head m Rubble stones kgr Rubble stones kgr Natural blocks tn Cross section at the body 3.0 m Rubble stones kgr Rubble stones kgr Natural blocks tn

14 Shoreline before breakwaters system construction Shoreline after (1 year) breakwaters system construction

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