Background elements on the 1:200,000 groundwater resources map of Vietnam

Background elements on the 1:200,000 groundwater resources map of Vietnam (Illustrative image)

According to Article 7 of Circular 17/2013/TT-BTNMT, the 1:200,000 groundwater resources map must ensure the representation of the following topographic elements:

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

Note: Details of the topographic elements comply with the regulations in the geographic information standards issued by the Ministry of Natural Resources and Environment. Background topographic elements are reduced by 15 to 25%, to prioritize the representation of water resource elements.

Additionally, the hydrogeological background elements shown on the 1:200,000 groundwater resources map include:

- Distribution area of water-bearing and non-water-bearing objects: water-bearing structures, water-bearing rock formations or large water-bearing complexes and non-water-bearing structures, formations, complexes;- Water-bearing faults;- Groundwater quality.

For more details, refer to Circular 17/2013/TT-BTNMT, effective from August 5, 2013.

Le Vy

>> CLICK HERE TO READ THIS ARTICLE IN VIETNAMESE