20230317
11105200
1.0
ISO 19139 Metadata Implementation Specification
FALSE
NZLDD_V1_DamSite
1105920.202000
2055033.427800
4875144.030600
5919351.804400
1
002
Projected
GCS_NZGD_2000
Linear Unit: Meter (1.000000)
NZGD_2000_New_Zealand_Transverse_Mercator
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20240402
12522400
20240402
12522400
ISO19139
50000
5000
NZLDD_V1_DamSite
Feature Class
1036
OBJECTID
objectid
OID
4
10
0
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
Shape
shape
Geometry
4
0
0
Feature geometry.
Esri
Coordinates defining the features.
DamSiteID
Dam Site ID
String
50
0
0
Unique ID of the landslide dam site.
SiteID
Site ID
String
50
0
0
ID that links all aspects of one landslide dam site, not unique.
Comments
comments
String
250
0
0
Any relevant comments.
X_Dam
NZTM Easting
Integer
4
10
0
The X coordinate of the dam point [NZTM2000].
Y_Dam
NZTM Northing
Integer
4
10
0
The Y coordinate of the dam point [NZTM2000].
H_Dam
Dam height
SmallInteger
2
5
0
The maximum height of the dam measured manually [m].
W_Dam
Dam width
SmallInteger
2
5
0
The maximum width of the dam measured manually [m].
L_Dam
Dam length
SmallInteger
2
5
0
The maximum length of the dam measured manually [m].
V_Dam
Dam volume
Integer
4
10
0
The estimated volume of the dam [m3].
Z_Dam
Elevation
Integer
4
10
0
The elevation of the dam point [m].
H_LS
LS relief
SmallInteger
2
5
0
Elevation difference (relief) between landslide crown and toe [m].
R_LS
LS runout in 2D
Integer
4
10
0
The maximum 2D (planimetric) runout distance from the landslide crown to toe [m].
L_LS
LS distance to watercourse
Integer
4
10
0
The maximum planimetric distance of the landslide Source centroid from the dammed watercourse [m].
H_L_ratio
H/L ratio
Double
8
38
8
The landslide relief (H_LS) to distance to watercourse (L_LS) ratio.
H_R_ratio
H/R ratio
Double
8
38
8
The landslide relief (H_LS) to 2D runout (R_LS) ratio.
V_LS_debris_sum
Sum volume of debris
Double
8
38
8
The sum volume of landslide debris [m3].
A_LS_debris_sum
Sum area of debris
Double
8
38
8
The sum area of landslide debris [m2].
Type_LS
Type LS
String
50
0
0
Classification of landslide movement type (Hungr et al., 2014).
Material_LS
Material LS
String
20
0
0
The type of landslide material.
Trigger
trigger
String
80
0
0
Main factor that initiated the landslide, if known or assessed.
Type_Dam
Type dam
String
10
0
0
Geomorphometric landslide dam classification (Costa & Schuster, 1988 in Fan et al., 2020).
FailureMech_Dam
Dam failure mechanism
String
50
0
0
The mechanism that led to dam failure or breach. Where more than one failure mechanism was involved, the most severe was selected.
Upstream_Catchment_Area
Upstream catchment area (km2)
Double
8
38
8
The area of the catchment upstream of the DamSite point [km2].
W_Channel_at_Dam
Channel width at dam
Double
8
38
8
Original channel width at dam prior to dam formation, measured manually [m].
Grad_Channel_at_Dam
Channel gradient at dam
Double
8
38
8
Original channel gradient at dam prior to dam formation [°].
Q_at_Failure
Discharge at failure
Double
8
38
8
Any reported discharge of water at dam failure, if recorded [m3/sec].
DBI
DBI
Double
8
38
8
The Dimensionless Blockage Index (Ermini & Casagli, 2003; Fan et al., 2020).
DateFormed_Dam
Date formed dam
String
20
0
0
The date the dam was formed, if known.
H_R3D_ratio
H/R3D ratio
Double
8
38
8
The landslide relief (H_LS) to 3D runout (R_LS_3D) ratio.
Dam_Stability
Dam stability
String
30
0
0
Dam stability, indicated by amount of time elapsed between dam formation and dam breach (Fan et al., 2020).
Dam_breach
Dam breach
String
80
0
0
The type of dam breach.
Dam_breach_details
Dam breach details
String
80
0
0
Details on dam breach, if known.
Confidence
Confidence
String
10
0
0
The confidence that the watercourse was dammed.
references_
References
String
200
0
0
SUBSET
Subset
String
10
0
0
Whether or not the landslide dam is part of a detailed case study subset analysis (in prep).
R_LS_3D
LS runout in 3D
Integer
4
10
0
The maximum 3D runout distance from the landslide crown to toe [m].
MetadataID
Metadata ID
Integer
4
10
0
Unique metadata ID of the primary source of the data that links to the QualityRankings table.
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400BD412-A1AD-4D42-907B-ED9619EF8F87
dataset
NZLDD Data Manager
GNS Science
+6445701444
PO Box 30368
Lower Hutt
5040
NZ
spatialdata@gns.cri.nz
20240402
ArcGIS Metadata
1.0
Feature Class
NZLDD_V1_DamSite
2023-01-25T00:00:00
R Morgenstern, A Wolter, SC Cox, B Lukovic, D Bain, A Sirohi, Z Bruce, K Jones, B Rosser, D Townsend, C Massey. 2023. The New Zealand Landslide Dam Database, v1.0.
The DamSite points signify the location of landslide dams and are situated at the upstream end of each dam. The point position is exactly on the river centreline so that river and catchment metrics can be systematically calculated. For consistency, river centrelines were generated using the 8 m national DEM for New Zealand (LINZ, 2012). For this reason, DamSite points may not always be immediately adjacent to the Dam polygons. There is always one DamSite point for one Dam polygon. For more information visit https://doi.org/10.21420/47GZ-A116.
This database has been developed by GNS Science and comprises Version 1.0 of the New Zealand (NZ) Landslide Dam Database (NZLDD). This database contains recent, historic and prehistoric landslide dams in NZ, defined as significant, ephemeral or enduring blockages of a watercourse by a landslide. Version 1.0 contains many catalogued landslide dams, but is not a complete database of all landslide dams that have ever occurred in NZ. A full description of the database is published alongside these data (Morgenstern et al., 2023).
R Morgenstern, A Wolter, SC Cox, B Lukovic, D Bain, A Sirohi, Z Bruce, K Jones, B Rosser, D Townsend, C Massey.
NZLDD Data Manager
GNS Science
+6445701444
PO Box 30368
Lower Hutt
5040
NZ
spatialdata@gns.cri.nz
New Zealand
multi-hazard
landslide
dam
landslide dam
Version 1.0
hazard
GIS
natural dam
database
multi-hazard
New Zealand
landslide
dam
landslide dam
Version 1.0
hazard
GIS
natural dam
database
This information has been prepared by the Institute of Geological and Nuclear Sciences Limited (GNS Science). The information is derived from multiple data sources, including 3rd party, which are at various scales and resolutions. As there is always uncertainty associated with such data, GNS Science gives no warranties of any kind concerning its assessment and estimates, including accuracy, completeness, timelines or fitness for purpose and accepts no responsibility for any actions taken based on, or reliance placed on them by any person or organisation. GNS Science excludes to the full extent permitted by law any liability to any person or organisation for any loss, damage or expense, direct or indirect, and however caused, whether through negligence or otherwise, resulting from any person or organisation's use of, or reliance on this information. These data are made availabile under the Creative Commons Attribution-ShareAlike licence (CC BY-SA).
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