The distance between the ground and the water surface upstream of the reservoir

This issue needs to be analyzed on a case-by-case basis.

Because this involves many factors, such as terrain, topography, reservoir size, etc. In general, however, the distance from the ground upstream of a reservoir will vary depending on reservoir size and topography. In some large reservoirs, this distance may reach tens of kilometers, because large reservoirs usually need to occupy a large area, and issues such as the ecological environment, land use and resettlement in the reservoir area also need to be taken into consideration.

In some small reservoirs or river reservoirs, this distance may be only a few meters to more than ten meters, because these reservoirs are smaller and occupy less land and environment. In addition, the distance between the ground and the water surface upstream of the reservoir may also be affected by the height and location of the reservoir dam. If the dam is built upstream of the reservoir, then this distance will be shorter, otherwise it will be longer.