The dozens of river channels about to overflow

These days the keyword is Martinho. According to Aemethigh -impact storms will leave very strong wind gusts (which, in the northern peninsular they can exceed 100 km/h). But that is not the most problematic.

The most problematic at this point in March is rain. According to the accumulatedMartinho will cause abundant rains in areas where Many weeks without stop raining: Above all, in the central system and Western Andalusia.

That is, the most problematic are the river channels.

But first of all, let’s talk about the ‘Fujiwhara effect’. And it is that one of Martinho’s peculiarities is that it comes from the hand of a relatively rare phenomenon in our country and that (most likely) ends up intensifying storm.

In general terms, the ‘Fujiwhara effect’ occurs when two systems With low pressures they approach each other and begin to “curl” around a common point. Ultimately, they can get to merge, but (whatever) the phenomenon can introduce changes in the intensity or trajectory of Borrasca.

That is just What seems to see: Some of Martinho’s secondary storms are going to start “orbit” around them and may be absorbed.

Hydrographic conferences are preparing. The best example is that of Guadalquivir. Only on Monday, March 17, the reservoirs of the basin released 234,135 cubic hectometers. It is not only a very high figure compared to the previous days but also As they point out in the Diario de Sevillaequivalent to all the ability of the swamp of Melonares (221,710 cubic hectometers) and a little more.

Although general figures may lead us to deception (the Guadalquivir basin, for example, is 50.35%), There are many swamps that are at the limit of their operational capacity. Ultimately, the figures are conditioned because the rains have concentrated in the northern part of the valley. The three largest reservoirs in the basin are in the southern part and are even more empty (Iznájar, 27.24% of its capacity; La Breña, at 29.22% of its capacity; and that of Negratín, to 31.74%).

In the center of the country. In the central system, the situation is not better either. On Wednesday, traffic was interrupted in the M-30 and the M-40 of the city of Madrid and today The possibility has begun to be contemplated that the Manzanares overflows. But this is just an example. Right now, each valley in the northern zone of the Tajo basin is becoming a funnel that channels much more water than they are accustomed (and are surely able to handle).

The clearest example is that there are reservoirs that They have unwanted for the first time. And they are over 50 years old.

The worst can be to come. Because, as we saw in The case of the Dana de Valenciathe problem is not only the rain: the problem is that all that water has to go somewhere. I do not want to say that we will meet a problem of such magnitude, but what is certain is that many zoans inside the peninsula will receive a huge amount of water.

And nobody is sure we know how to manage it well. ‘Prudence’, again, will be the keyword once ‘Martinho’ discharges all his strength.

Image | ECMWF

In Xataka | If the question is when the rain is going to end, Aemet has bad news. Especially for Andalusia