A perennial problem for Longboaters was water quantity and quality.

"In many cases, water quantity is closely related to water quality," she said.

This river is fed by permanent springs; the water quantity, however, varies.

Intensification of agriculture has affected both water quantity and quality.

The water quantities are variable, mainly because the river is fed by the spring thaw.

But this water quantity is not equally distributed during the whole year.

For a long time the Commission was only concerned with water quantity until salinity became a problem.

This situation has also led to reduced water quantity in the springs and small rivers.

Accordingly there are for the water economy an operating plan that is dependent on the time of year and the expected water quantities.

The natural domain contributes: water quantity, quality, and ecosystem constraints.