*** Measurement data from 'Observations of cross-shore chenier dynamics in Demak, Indonesia' ***

Authors: Silke Tas^1,*, Dirk S. van Maren^1,2 and Ad Reniers^1
^1: Faculty of Civil Engineering and Geosciences, Delft University of Technology
^2: Deltares
*: Corresponding author: Silke Tas (s.a.j.tas@tudelft.nl)

*** General introduction ***
This dataset contains the observations of a single chenier along the coast of Demak, Indonesia between 28 November 2018 and 4 December 2018. It is being made public to act as supplementary data for publication ***citation will follow once paper is published***

*** Acknowledgements ***
This work is part of the BioManCO project with project number 14753, which is (partly) financed by NWO Domain Applied and Engineering Sciences, and co-financed by Boskalis Dredging and Marine Experts, Van Oord Dredging and Marine Contractors bv, Deltares, Witteveen+Bos and Wetlands International. The BioManCO project, initiated and coordinated by Han Winterwerp, is a collaboration between Delft University of Technology, NIOZ and Universitas Diponegoro (UNDIP) and makes use of the framework set up by Building with Nature Indonesia, a programme by Ecoshape, Wetlands International, the Indonesian Ministry of Marine Affairs and Fisheries (MMAF), the Indonesian Ministry of Public Works and Housing (PU) and other partners. The field work was organised in collaboration with Alejandra Gijón Mancheño and Celine van Bijsterveldt and co-supervised by Muhammad Helmi. In the field we received assistance from staff and students of UNDIP. We also would like to thank the families of Pak Slamet and Pak Matsaeri for hosting us in Timbulsloko.

*** Description of files in this data set ***
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FILE: 	DGPS.MAT
METHOD: Several high-resolution topographic surveys were conducted using Trimble 5700 DGPS receivers, one serving as fixed base station and the other a mobile sensor to measure the coordinates and elevation of points on the chenier. Due to problems with the base station, the absolute height of each measured profile is unknown. However, the relative height of each profile with respect to each other could be determined using data of erosion pins at the emerged part of the profile. Profiles were collected between 28 November and 4 December 2018.
CONTENTS: 6 fields, each representing one day (28/11/2018, 30/11/2018, 01/12/2018, 02/12/2018, 03/12/2018, 03/12/2018). Each field contains the x-coordinates and z-coordinates in [m]. Origin x-axis is location of offshore wave buoy (see WAVEDROID), positive direction towards the coastline. Origin z-axis corresponds to mean sea level, positive direction upward.
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FILE: 	WAVEDROID.MAT
METHOD: Offshore wave data was collected using a WaveDroid directional wave buoy, which was deployed at a water depth of 12 m, 5.5 km offshore of the chenier (location S0, at x=0). 
CONTENTS: 6 fields: 
(1) t, time [UTC + 7]; 
(2) Hs, significant wave height [m];
(3) Tp, peak wave period [s];
(4) Dp, peak wave direction [rad, nautical];
(5) E, 1D energy density spectrum [m^2/Hz];
(6) G, 2D energy density spectrum [m^2/Hz/rad].
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FILE: 	WAVE_LOGGERS.MAT
METHOD: Water level information was collected using three OSSI-010-003C-01 Wave Loggers, at S1, S2 and S3, sampling at a frequency of 10 Hz. S1 is the most seaward sensor, located seaward of the chenier, at a submerged bar (around x=5425), S2 is just seaward of the chenier crest (around x=5520) and S3 is landward of the chenier crest (around x=5620). The pressure signal of the sensors was used to calculate wave spectra over intervals of 30 minutes, with a frequency resolution of 0.01 Hz. The sensors were located 15 cm above the bed and emerged partly throughout the tidal cycle. 
CONTENTS: 3 fields, each representing a station (S1, S2 and S3), containing 6 fields:
(1) t, time [UTC + 7];
(2) d, water depth [m];
(3) Hs, significant wave height [m];
(4) Tp, peak wave period [s];
(5) E, energy density spectrum [m^2/Hz];
(6) F, frequency vector [Hz].
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FILE:	ADV.MAT
METHOD: Current velocities were obtained using an Acoustic Doppler Velocimeter (ADV), deployed at the seaside of the chenier at S1 (same location as one wave logger, seaward of the chenier, at a submerged bar around x=5425), measuring at a frequency of 4 Hz. The x-axis is perpendicular to the coast, positive in onshore direction; the y-axis is parallel to the coast, positive in northeastern direction; and the vertical z-axis is positive upwards. The measuring volume was situated 30 cm above the bed, and the sensor emerged partly throughout the tidal cycle.
CONTENTS: 5 fields:
(1) t, time [UTC + 7];
(2) u, velocity in x-direction [m/s];
(3) v, velocity in y-direction [m/s];
(4) w, velocity in z-direction [m/s];
(5) p, pressure [dbar].