Oehl

Regarding the Oehl's hydrography, here are some key points:

• The Oehl originates at an elevation of 275 meters above sea level (m + NAP)

• The Oehl joins the Geul River at an elevation of 255 meters above sea level (m + NAP)

• The drop in elevation is 20 meters

• The Oehl has a length of 1700 meters

• Its gradient is approximately 11.76^[4]

In Eynatten, there were two water castles: the Herrenhaus (usually referred to today as Amstenrath Castle) and the Vlattenhaus. The former is still in good condition, while the latter has deteriorated into ruins (and has since been modernized). Between these two castles, there's a powerful spring that contributes to the Oehl's consistent flow.

Further south, closer to the Geul-Roer watershed, groundwater emerges on both sides of the road from Eupen to Eynatten. Depending on precipitation levels, these sources can turn into small streams that supply water to the Oehl for part of the year. The spring in Eynatten, which had an output of about 3 cubic meters per hour around 1975, has satisfied the water needs of the local population for centuries. It featured a pumping system that could be easily activated by anyone needing water. It wasn't until around 1970 that the village was connected to the municipal water supply system. The springwater flows into a pond, which then feeds the Oehl. As it continues, the Oehl receives water from various springs, including one near the Herrenhaus. Just north of the Herrenhaus, the Oehl passes under the N68 road and flows through meadows toward the A3 freeway. About halfway along, another stream joins alongside the Oehl, which is supplied by a strong spring. According to Meerman's research,^[5] this stream actually contributes to the Oehl's flow! A bit downstream, the Möschenbergsbach also merges with it. Eventually, the stream goes under the highway and combines with the Geul. The hydrological conditions in the latter part of the Oehl valley have significantly changed due to the construction of the highway.

• Originates at an elevation of 277 meters above sea level.

• Joins the Oehl at an elevation of 257 meters above sea level.

• Total drop in elevation: 20 meters.

• Length: 1650 meters.

• Gradient: 12.12 ^[4]

The Möschenbergbach doesn't have a clearly defined starting point either; it features numerous groundwater discharge points. The stream takes a distinct form southeast of Eynatten and then flows towards the Möschenberg hamlet. To the north of Möschenberg, the creek meanders through marshy meadows, eventually transforming into a marshy area where it merges with the Oehl.

• Gulp (river)
• Geul
• List of rivers of Belgium
• Rur (river)

50°42′17″N 6°05′25″E / 50.704662°N 6.09035254°E / 50.704662; 6.09035254