20241112
14273200
1.0
FALSE
GroundwaterSalinityEC
002
Geographic
GCS_WGS_1984
Angular Unit: Degree (0.017453)
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20241008
17015400
20241008
17015400
ItemDescription
150000000
5000
dataset
20241008
File Geodatabase Feature Class
Esri ArcGIS 13.3.0.52636
GroundwaterSalinityEC
1
51.582732
56.010129
24.911248
22.631621
Source Agency: DCI (2018)
Collection Agency: DCI (2016/17)
Maintenance Agency: EAD
Custodial Agency: EAD
Contact: EAD - Environment Information, Science & Outreach Management (EISOM)
TDS
EC
Salinity
Kriging
Interpolation
Results from the survey period field measurements and lab measurements.
<DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 11 0;"><SPAN>Two areas of freshwater with low mineral content are found in Abu Dhabi Emirate</SPAN><SPAN>:</SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN>In the northeast, rainfall from the Hajjar Mountains recharges the aquifer and slowly flows towards the Arabian Gulf. The longer the water remains in the aquifer, the more time it has to dissolve minerals and interact with the rocks: In general, the water gets more saline as it flows towards the sea. </SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN>Another area of low salinity is found north of Liwa, where recharge from rainfall is minimal and the resulting groundwater is older. Most of it entered the aquifer thousands of years ago, in a time with a more humid climate. Very slow groundwater flow, uniform sandy lithology, and a distinct vertical salinity gradient in the aquifer have kept the uppermost groundwater fresh for centuries. </SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN>Along the coast in the west, as well as in the southeast, the groundwater table is very shallow. In these sabkha flats, the groundwater comes close to the surface and some of it evaporates. The dissolved minerals stay behind and lead to a further salinisation of the groundwater. Water in these regions can be as salty as 140,000 mg/</SPAN><SPAN>L</SPAN><SPAN>; that is more than three times as salty as the water of the Arabian Gulf.</SPAN></P><P STYLE="margin:0 0 7 0;"><SPAN /></P><P STYLE="margin:0 0 7 0;"><SPAN /></P><P STYLE="margin:0 0 7 0;"><SPAN>Field Descriptions:</SPAN></P><P STYLE="margin:0 0 7 0;"><SPAN>-OBJECTID</SPAN><SPAN>:A</SPAN><SPAN> </SPAN><SPAN>unique, not null integer field used to uniquely identify rows in tables in a geodatabase.</SPAN></P><P STYLE="margin:0 0 7 0;"><SPAN>-S</SPAN><SPAN>hape:</SPAN><SPAN /><SPAN>Field which shows the stored geometry type created through ArcGIS (Point, Line, Polygon, Multipoint or Multipatch)</SPAN></P><P STYLE="margin:0 0 7 0;"><SPAN>-</SPAN><SPAN /><SPAN>Classes:</SPAN><SPAN /><SPAN>Consecutively numbered classes of Salinity (0-7)</SPAN></P><P STYLE="margin:0 0 7 0;"><SPAN>-</SPAN><SPAN /><SPAN>Value_Max:</SPAN><SPAN /><SPAN>Upper value of TDS [mg/L] for the selected, corresponding salinity class</SPAN></P><P STYLE="margin:0 0 7 0;"><SPAN>-</SPAN><SPAN /><SPAN>Shape_Length:</SPAN><SPAN /><SPAN>Represents the total length of a polygon's perimeter, in the units used by the feature class' coordinate system</SPAN></P><P STYLE="margin:0 0 7 0;"><SPAN>-</SPAN><SPAN /><SPAN>Shape_Area:</SPAN><SPAN>Represents the total area of a polygon, in square units of the linear distance unit used by the feature class' coordinate system</SPAN></P><P STYLE="margin:0 0 7 0;"><SPAN>-</SPAN><SPAN /><SPAN>RuleID:</SPAN><SPAN>Range of salinity class in mg/L for labeling purposes</SPAN></P><P STYLE="margin:0 0 7 0;"><SPAN>-</SPAN><SPAN /><SPAN>Override:</SPAN><SPAN>A BLOB field that stores feature-specific override to the representation rules</SPAN></P><P><SPAN>Processing Steps: Geospatial TDS data from groundwater sampling has been interpolated using Kriging to create polygons showing the distribution of groundwater salinity in </SPAN><SPAN>eight </SPAN><SPAN>classes ranging from 0 to 50,000 mg/L</SPAN></P><P><SPAN><SPAN>Resolution: n/a</SPAN></SPAN></P><P><SPAN>Data Quality: data was QC checked for consistency</SPAN></P></DIV></DIV></DIV>
0
EPSG
6.2(3.0.1)
GroundwaterSalinityEC
Feature Class
0
OBJECTID
OBJECTID
OID
4
0
0
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
Shape
SHAPE
Geometry
0
0
0
Feature geometry.
Esri
Coordinates defining the features.
Classes
Classes
Integer
4
0
0
ValueMax
Value Max
Double
8
0
0
Shape_Length
SHAPE_Length
Double
8
0
0
Length of feature in internal units.
Esri
Positive real numbers that are automatically generated.
created_user
Created User
String
255
0
0
created_date
Created Date
Date
8
0
0
last_edited_user
Last Edited User
String
255
0
0
last_edited_date
Last Edited Date
Date
8
0
0
Shape_Area
SHAPE_Area
Double
8
0
0
Area of feature in internal units squared.
Esri
Positive real numbers that are automatically generated.
RuleID
Rule ID
Integer
4
0
0
Simple
FALSE
0
TRUE
FALSE