07 Terrain Elements of the Groundwater Resources Map at a Scale of 1:50,000

According to Circular 15/2013/TT-BTNMT, the groundwater resource map at a scale of 1:50,000 must ensure the representation of the following topographic factors:

Illustration (internet source)

- Mathematical base layer: map name, grid frame, elements outside the frame;- Topographic layer: contour lines, elevation points, elevation values;- Hydrological layer: rivers, streams, lakes, and their names;- Transportation layer: roads, railways, bridges, and their names;- Residential layer: concentrated residential areas, residential clusters;- Administrative layer: headquarters of the People's Committee of districts and provinces; names of administrative units;- Boundary layer: district and provincial boundaries, borderlines, sub-basin and basin boundaries.

Details of the topographic factors must comply with the regulations in the geographical information standards issued by the Ministry of Natural Resources and Environment. The background topographic factors are reduced by 15 to 25% to prioritize the representation of water resource factors.

For the hydrogeological background factors represented on the groundwater resource map at a scale of 1:50,000, they include:

- Distribution areas of water-bearing and non-water-bearing objects including: complexes, aquifers, and formations, non-water-bearing complexes;- Water-bearing faults, predicted water-bearing faults, and undetermined water-bearing conditions;- Groundwater quality.

See additional regulations at: Circular 15/2013/TT-BTNMT, effective from August 5, 2013.

Thu Ba

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