area line zone line zone symbol flow direction entrance symbol cave

The observations made allowed us to elaborate the concept of the drainage system in this part of the massif and, consequently, to plan further exploration.
The practically whole area seems to be drained by the Río Dobra, an affluent of the Río Sella. The drainage occurs three, essentially parallel, NW-trending, systems. These are the systems related with the Río Junjumia, Río Redemuna and Río La Beyera, which communicate with the Río Dobra through the Río Palebarda. The courses of these systems are nearly identical. They begin in caves which have the maximum vertical and horizontal extents, in their respective areas, above the level of sumps. Water reaching the sump level flows NW towards the respective rivers, collecting water from the encountered cave systems, which are vertically developed before reaching the sump level. The known caves near the resurgences are active water conduits. When emergent, the streams maintain their flow direction, until their waters reach the Río Dobra, which flows to NW and takes the water out of the massif.
According to this concept, the most important and the longest seems to be the system connected with the Río Redemuna, more than 5 km long. It drains the NE and central parts of the area allotted to exploration. The erosion base for this system lies at altitude 1250-1300 m, while its highest points reach 2385 m, thus giving a maximum altitude range of 1000–1100 m. The system extends from beneath Joon de los Desvios towards the north-west to the Río Redemuna. In its initial course it is supplied, among others, by the already known cave systems which attain the sump level beneath Joon de los Desvios. These include:
- on the east, from the slopes of the Redondo del Conjuarto - Sistema Conjuarto (1/6, 2/6);
- on the south, from the slopes of the Torre de la Canal Parda and the Torre de los Traviesos - Sistema del Jou de la Canal Parda (A-30/A-25/A-24/A-1) and Pozu del Porru la Capilla (A-11).
On its way down it collects waters, among others, from Sistema del Canalon de los Desvios (F-18/F-17/F-15) and before emerging on the surface its waters flow through (beneath, along) Cueva del Frieru (K-1) and Cueva del Viento. Other greater caves of this system include Pozu del Porru de los Garapozales (A-3), Sima de los Desvios (F-3) and Sima Profunda. The western and southern boundary of this system seem to be the line going through the Redondo del Conjuarto, Torre de los Traviesos and Torre de la Canal Parda. It is difficult to ascertain if the this line turns at the Tiro de la Llera.
Somewhat shorter, no more than 4 km long, is the system connected with the Río Junjumia. It is relatively little known. Many caves in this area have been not explored to
the sump level. The system drains the SW part of the area allotted for exploration. The erosional base lies at altitude 1350-1400 m, while the highest point may reach 2100 m a.s.l., so the maximum vertical range is about 700 m. The system runs from somewhere beneath Jou Sin Tierri towards the NW to the Río Junjumia. In its uppermost course it is supplied, among others, by the already known cave system Sistema Cembavieja (zone of SCP Valencia). Other large caves in this area include, besides those situated in the SCP zone, cave G-13, Red de los Barrastrosas (G-7/G-4/G-5/G-1/G-6), cave SCP