This map layer shows the number of dams per country and also gives information on the country’s total storage volume.

Example: How to read the map:

In the United States, there are 1902 dams altogether with a total storage volume of 726,530 million m³.

Data sources:

  • Global Water System Project (GWSP) / Lehner et al. – GRanD Database

    The GRanD (Global Reservoir and Dam) database was built in the course of the Global Water System Project. The latest version contains information on over 6,852 dams worldwide as well as the corresponding reservoirs (from a storage volume of over 0.1km3).
    In addition to information on the height of the dams, storage volumes and dam’s function, the database also provides information on the dammed river and the corresponding river basin


Buchhandlungen bangen um die Buchpreisbindung

Data tables

For some select map layers, the information portal ‘War and Peace’ provides the user with all used data sets as tables.

More ...
Magnifying Glass in front of a Boston map

Country portraits

In the country reports, data and information are collected by country and put into tables that are used in the modules as a basis for maps and illustrations.

More ...
Compass with Mirror

Navigation and operation

The information and data of each module are primarily made available as selectable map layers and are complemented by texts and graphs. The map layers can be found on the right hand side and are listed according to themes and sub-themes.

More ...