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Rieger's Path

How the river works

Source areas of Jizera are Krkonoše adn Jizera Mountains. Krkonoše Mountains are the wettest place in the Czech Republic. Jizera subsoil is granite and also cracks allow water zasakovat. Lower temperatures in a confine vapors. A large proportion of the precipitation flows and, therefore, at the mouth of Jizera still achieves twice more specific runoff (this is the amount of water that flows per unit of time per unit of catchment area) than the national average. In the evolving landscape of river bed folded many times and often change direction. The development of the riverbed is subject to certain laws. The river has a greater slope, the more energy must resist its banks and bottom. The river seeks its balance. In low-lying areas and river meanders through twists and extends their flow. This condition is not permanent. Flood with many times more force is looking for its balanced state.

Swollen river at gallery

Material that river stores, shows the length of its transport as well as climate. Jizery carries minimum sand. Rather, there are boulders or rocks. In hard rocks, the water looks way harder. Due to the greater slope of the river to spread the width, but it is in the direction of gravity and creates a gorge with a greater slope, whose direction is straightforward. Water seeks the path of least resistance, and that is usually where the rocks were fractured in some horotvorném process. This is especially true point breaks. The great river can drop from time to time move with large boulders. Mnohametrákové blocks can roll or skid, they are completely embedded in the flood water. If this happens, easier and faster to grind or break off the tabs on the bottom.

A river can move boulders weighing up to three tons.

The development of river basins and their changes can be observed also by river terraces. So how does the trough gradually incised remain in the landscape river sediment. Today is also one hundred meters above the current riverbed Jizera.

The Stone Lion. The slopes are overgrown today, so rocky formation is not visible well.

GPS position

N 50° 37.034', E 15° 18.513'



Geopark UNESCO Český ráj
Jiří Vlasák