Temporality and Vitality of Rivers

(Reading time: 16 min; summary of the article in plain language)

„The purposes of this Act are (…) to give the River the capacity of a natural person in order to protect its right to exist and flow, to maintain its vital cycles, natural biodiversity and integrity, to fulfil essential functions within its ecosystem, to be nourished by its aquifers and tributaries, to be protected from contamination and to regenerate (…)“ (Learn more)

This passage from a draft bill of the Canadian House of Commons dated May 5, 2022, may seem unusual at first glance: it grants a river system the status of a legal person. But this idea is less far-fetched than it might appear—on the contrary: in the following text, I would like to show why it is entirely plausible to understand rivers as living actors.

The small Black Forest river Wutach (in Germany), which will appear again later, accompanies this text visually. You can find more photos of living rivers in my gallery streaming waters.

To begin, I invite you on a short journey into Earth’s history. We start on long (geological) timescales ranging from tens of thousands to a few million years—and then move closer to periods that fall within our historical perception: centuries, decades. Throughout this text, the relationship between humans and rivers is a central theme—and so is the question of how profoundly rivers can change. We will see: their dynamism is impressive—and suppressing it, for instance through technical interventions such as river engineering, is not always a good idea. Especially in the face of the climate crisis, with increasing extreme weather events and droughts, the importance of a new understanding of rivers becomes clear.

I begin our journey with a look at the upper course of the Danube—and into its geological past

Development of the upper Danube over the course of Earth’s history

The history of the Danube can be traced back to the Upper Miocene, around 5–10 million years ago. The source region of the ancient Danube (Urdonau) was initially located in the Aar Massif, a mountain massif now found in the central Swiss Alps.

In the Pliocene (5.3 to 2.6 million years ago), due to tectonic uplift, the Danube lost large parts of its catchment area, and its source region shifted to the Black Forest. The headstream that originates at the Feldberg (highest peak of the Black Forest) is called the „Feldberg Danube“ („Feldberg-Donau“).

A particularly formative event was the so-called Wutach breakthrough, which occurred about 18,000 years ago: due to headward erosion and dammed meltwater, the Feldberg Danube was diverted into the Wutach Valley toward the Upper Rhine within a very short period of time. This led to the formation of the Wutach Gorge (Wutachschlucht) and the striking Wutach Bend (Wutachknie).

This event may have lasted only weeks or months and could have occurred in the presence of early humans (Learn more).

Today, the Danube rises near Furtwangen at an elevation of around 1,100 meters on a plateau in the central Black Forest.

That was the short version; for more details, see: A Short History of the Danube: A short history of the Danube

Even in the Holocene, the Wutach—one of the few remaining wild rivers in Germany—continued to cut deeper into the rock, a process that still continues today. In its upper course, this river has carved its way through a sequence of rock layers of different ages. The photo shows the Wutach in a section where it flows through Muschelkalk (shell limestone) layers (Learn more).

Panoramic view of a river in an autumnal forest landscape. In the left foreground, water emerges from cracks in the limestone rock and flows into the river. The long exposure time makes the water surface appear soft and partly blurred, enhancing the impression of movement and flow.
The Wutach at a spot where water that had seeped into the ground several hundred meters upstream re-emerges from the limestone.

Those who hike through the Wutach Gorge get a vivid sense of how dynamic and changeable this landscape remains today (Learn more).

In spring, when the Wutach carries a lot of water, its dynamism is especially striking.

The river was photographed from a low angle just above the water surface, with the view looking upstream against the current. Due to the slightly extended exposure time, the waves appear softened, and the water shows streaky patterns that emphasize the dynamics of the flow.
The Wutach: a powerful river that tirelessly carves its path.

Development of rivers on shorter timescales and the influence of humans

We have looked at how rivers change over timescales ranging from millions to just a few thousand years. But rivers also alter their course—when left to do so—on much shorter, more humanly accessible timescales of centuries or decades. In doing so, they are usually engaged in a dynamic interplay with human activity: for a long time, humans have been intervening in the natural course of rivers—straightening them or modifying them to facilitate trade or support other economic sectors, such as the historical timber rafting industry in the Black Forest, Germany. Here, the tributaries of the Rhine were used to transport enormous quantities of timber. Even on streams high in the remote elevations of the Black Forest, splash dams were constructed in order to use the power of briefly dammed water to transport large tree trunks downstream (Learn more).

This means that humans have repeatedly influenced the natural (i.e., undisturbed) course of water bodies.

At times, a surprising interplay can emerge between human interventions and the river’s own dynamic behavior—provided that this natural behavior is not entirely suppressed. Fluvial morphologist Thomas Fleischhacker analyzed changes in the riverbed of the Mulde, a tributary of the river Elbe, north of Eilenburg (Saxony, Germany), for the period from 1905 to 2018 (Learn more). In this section, the river has developed largely naturally, with only minimal bank reinforcement. The study uses historical maps and aerial imagery to show how the Mulde repeatedly altered its course through natural processes and human interventions. Two human-made cut-throughs are examined in particular: one in 1902 to shorten a meander near Oberförsterwerder, and another in 1915 to create land for the German Celluloid Factory. Both interventions had long-term impacts on river morphology, leading to new flow patterns, increased erosion, and course changes—as if in a „counter-reaction“ by the river itself.

The study also includes beautifully rendered maps overlaying the Mulde's course from different years, color-coded for comparison (Learn more).

Using the example of the Kinzig River in the Black Forest, Germany, Thomas Fleischhacker compellingly demonstrates (by comparing historical maps with the river’s current condition) how a once vibrant river landscape can lose its natural variability when its free course is heavily restricted by river engineering. He observes (citation translated by myself):

„If you look at the Kinzig today between Kehl and Hausach, you will see a straightened and uniformly developed river course, almost entirely accompanied by dikes and grassy floodplains. With this image in mind, it is hard to imagine that, before its development, the Kinzig was a very dynamic, wild river, with a riverbed characterized by sand and gravel banks and considerable differences in width. Due to the development of the Kinzig, the diversity of the riverbed was lost, and with it many different habitats for fish, small creatures, and aquatic plants.“ (Learn more)

The following photo shows another heavily developed river, the Neckar near Mannheim (Learn more):

A monochrome blue-toned photo of the Neckar River in Mannheim in the evening during the blue hour. The view is from a bridge looking onto the river, which narrows perspective-wise toward the center of the image. On the right riverbank, the Mannheim TV tower is visible. In the distance above the river, a flock of birds appears blurred due to motion blur.
The Neckar has been straightened within the city limits of Mannheim and there has more of the character of an artificially constructed canal.

It becomes evident that the technical modification of rivers—such as straightening—is not always sustainable in the long term. Such measures reduce resilience to flooding because important floodplains are lost. These natural retention areas are crucial for absorbing excess water during high water events (see also this article from WWF).

As a result, many rivers have lost their natural dynamism—or in other words, their vitality.

With ongoing global warming caused by human greenhouse gas emissions, the frequency of extreme weather events is also increasing (Learn more). Consequently, the flood risk in Germany has risen significantly. The loss of resilience due to river straightening weighs even more heavily today.

However, there are countermeasures, such as river restoration: efforts to return a river or stream that has been altered by human activity to a more natural state. These measures can help restore, at least in part, the river’s natural dynamics and create retention areas that mitigate the effects of flood events. By re-establishing natural banks and floodplains, a river’s capacity to store and retain water improves, significantly reducing the impacts of extreme weather events. These retention areas function like natural sponges: they absorb excess water during heavy rainfall or flooding and slow down runoff. This helps prevent large volumes of water from rushing uncontrollably into cities or other developed areas and causing floods (see, for example, the following BBC article).

But let us not view river restoration only as a preventive damage control strategy under the label of flood protection. Rather, river restoration is part of a positive, forward-looking narrative—when understood as a holistic, integrative project. Because when a river is given back a portion of its original space—and indeed its vitality—in consideration of existing development, local conditions, and with the involvement of the local community, much more happens: species that had disappeared may return; biodiversity is positively impacted. Moreover, new spaces for recreation and enjoyment can emerge for residents and visitors alike.

The following photo once again illustrates the vibrant dynamism of the Wutach.

A flowing river photographed in the direction of the current. In the foreground, a rock partially emerges from the flow, and a tree trunk extends into the frame from behind. Due to the long exposure time, the water appears blurred and flowing.
The wild Wutach, photographed in spring 2019.

If you’d like to immerse yourself in the sounds of the river, open this audio recording, which I made at the same time (Learn more):

The shared world and the web of life

With the concept of river restoration, we have already begun to bridge toward ecology. Ecology is defined as the science of the interactions between organisms and their environment. However, instead of using the term „environment“, I prefer to speak of the „shared world“ (Mitwelt). While the term „environment“ suggests that humans relate to something surrounding them and separate from them, „shared world“ stands for:

the totality of all living beings with whom we share reciprocal relationships and responsibilities, as part of a common web of life (Learn more).

Viewed from this perspective, humans, animals, and plants are interconnected and form a dynamic ecosystem. This viewpoint implies a more respectful and sustainable attitude toward nature, as it emphasizes the mutual dependence of all living beings.

In my understanding, the concept of the Mitwelt comes very close to the understanding of „nature“ that was already shaped in the 18th century by the great German naturalist and explorer Alexander von Humboldt (1769–1859). In a work of his from1807, we find the following statement:

„In this great chain of causes and effects, no single fact can be considered in isolation. The general equilibrium obtaining in the midst of these disturbances and apparent disorder is the result of an infinite number of mechanical forces and chemical attractions which balance each other; and while each series of facts must be examined separately in order to recognize a specific law, the study of nature, which is the main problem of general physics, demands the gathering together of all the knowledge dealing with modifications of matter.“

The cultural historian Andrea Wulf goes so far in her biography of Humboldt as to say that Humboldt „invented“ nature as the „Netz des Lebens“ („web of life“) (Learn more).

This means that the concept of Mitwelt, as I have outlined it here, can be seamlessly connected to Alexander von Humboldt’s idea of the „web of life”.

It is self-evident that this way of thinking also—and especially—implies a responsibility toward future generations. This becomes clear when we consider statements like the following by Alexander von Humboldt. Here, he speaks about the negative consequences of deforestation, which he observed during his travels through South America in the year 1800, at Lake Valencia in Venezuela:

„The changes, which the dep, of forests, the ‘clearing of) plains, and the cultivation of indigo, have produced within half: a century, in the quantity of water flowing in on the one hand; and on the other the evaporation of the soil, and the dryness of the atmosphere; present causes sufficiently powerful to explain the successive diminution of the lake of Valencia. I am not of the opinion of a traveller who has visited, these countries since me, that ‘to set the mind at rest, and for the honour of science’, a subterranean issue must be admitted. By felling the trees, that cover the tops and the sides of mountains, men in every climate prepare at once two calamities for: future generations; the want of fuel, and à scarcity of water. Trees, by the nature of their perspiration, and the radiation from their leaves in a sky without clouds, surround themselves with an atmosphere constantly cold and misty. They affect the copiousness of springs, not, as was long believed, by a peculiar attraction for the vapors diffused through the air, but because, by sheltering the soil from the direct action of the Sun, they diminish the evaporation of the water produced by rain. When forests are destroyed, as they are everywhere in America by the European planters, with an imprudent precipitation, the springs are entirely dried up; or become less abundant. The beds of the rivers, remaining dry during a part of the year, are converted into torrents, whenever great rains fall on the heights. The sward and moss disappearing with the brush-wood from the sides of the mountains, the waters falling in rain are no longer impeded in their course and instead of slowly augmenting’ the level of the rivers by progressive filtrations, they furrow during heavy showers the sides of the hills, bear down the loosened soil, and form those sudden inundations, that devastate the country.“ (Learn more)

Establishing places of good living („Orte guten Lebens“)

I would like to take this a step further and make the case that a way of life grounded in the understanding of a „shared world“ (Mitwelt)—marked by sustainability and humility in our relationship with nature, especially rivers—can foster a way of living that enables a „good life“ for both current and future generations.

To illustrate this idea, I draw on the work of alpine researcher Werner Bätzing, who coined the term „places of good living“ (Orte guten Lebens) in his studies—particularly with a focus on the Alpine region (Learn more). Bätzing advocates for the establishment of new forms of land use and tourism in this region, which is particularly vulnerable to the climate crisis. These forms would promote responsible resource management and a respectful relationship with both the landscape and the local population.

„Places of good living“ emerge where people, nature, and culture exist in a balanced relationship. They are characterized by a sustainable economy and gentle tourism that benefit the local population while also respecting natural foundations (Learn more). In such places, landscapes, plants, animals, and fellow humans are not viewed as mere objects but as integral parts of a shared living environment.

From my perspective, „places of good living“ are a direct expression of a lived Mitwelt.

In these places, the well-being of all is inextricably linked to the well-being of nature. Bätzing emphasizes the unique role of the Alpine region as a sensitive ecosystem—essentially a „warning system for Europe“. At the same time, he sees it as a potential role model: a model region where new forms of economy and community life can emerge. His vision is the development of a new model of economy and living (translated by me):

„in which, instead of economic dominance, a vibrant and livable life stands at the center—one lived in responsibility for oneself, for fellow humans, and for one’s own living environment. This, in turn, would manifest in countless 'places of good living' in the Alps and throughout Europe.“ (Learn more)

When we turn our attention to rivers, it becomes clear that they too hold potential for such places of good living.

Measures to restore natural river systems not only increase resilience to extreme weather events but also promote biodiversity and create new, nature-oriented recreational spaces. Living with the river becomes possible again. Along the Ruhr River (North Rhine Westphalia, Germany), for example, renaturation projects have given rise to new recreational landscapes (Learn more).

In the Murg River area in the northern Black Forest, similarly positive outcomes have been observed. Thomas Fleischhacker describes it as follows (translated by me):

„But it’s not only ecology and flood protection that have improved. For the first time, you see many people—especially on hot summer days, children playing in and by the river, easily reaching it via gently sloping banks. In the era of the engineered river, the steep, paved embankments made water access almost impossible, and the meadow areas were mostly frequented by dog walkers. Now, people themselves have benefited from the transformation and are reclaiming the riverbed. This redesign can serve flood protection, ecology, and people alike—and return to the river a bit of the face it once had.“ (Learn more)

This description could easily be part of the positive, forward-looking narrative I mentioned earlier—a narrative that demonstrates how sustainable use of natural resources does not have to mean sacrifice but can, in fact, enhance quality of life. In this sense, the river—understood as part of a living network—can become a central element of the „good life“.

Indigenous perspectives: Towards a new legal understanding for rivers

We have seen that rivers show a high level of dynamism across different timescales. They change over the course of millions and thousands of years, as well as on timescales that are perceptible to us as humans.

The verb in the title of the most recently cited article – How a River Experiences Industrial Development (translated by me) – provides an insightful introduction to the following reflections. If we understand our relationship with nature as „network-like“, then it is a logical next step to consider rivers as living beings (Learn more).

Based on the idea of networks, we can now adopt a perspective that is taken for granted in many Indigenous cultures. A great introduction to this is provided by Robert Macfarlane’s book Are Rivers Living Beings? (Learn more). It discusses rivers and the people who advocate for their protection.

One river highlighted in the book is the Río Los Cedros, which flows through a tropical cloud forest in the Ecuadorian Andes. Tropical cloud forests usually form at elevations between 1,000 and 3,000 meters due to high humidity and heavy fog. Biologist Giuliana Furci, who specializes in mycology, emphasizes the close connection between the river, the forest, and the underground fungal networks (Learn more).

Through these descriptions, Robert Macfarlane illustrates an expanded understanding of nature's interconnections – as a „network of the living“.

A picture of a forest in spring, taken from below, looking up. The canopy is a bright green. It is a protected forest, and between the tapered tree trunks, individual branches protrude, which from this perspective appear like a net, stretched perpendicular to the direction in which the tree trunks grow upward.
The Forest in the Wutach gorge as part of a larger „network of the living“.

The author and the people in his novel consistently relate to rivers as if they were living beings. This attitude is expressed clearly in many passages, such as this one:

„It seems clear to me then, in that strange, bright water, that to say a river is alive is not an anthropomorphic claim. A river is not a human person, nor vice versa. Each withholds from the other in different ways. To call a river alive is not to personify a river, but instead further to deepen and widen a category of 'life', and in so doing – how had George Eliot put it? – 'enlarge the imagined range for self to move in'.“ (Learn more)

But his book also reveals the dangers to which these systems are exposed. He describes how rivers can die – for example, through mining. He quotes Giuliana Furci as follows:

„'The mining would kill this river stone-dead,' says Giuliana. 'If you take away the forest, you take away the rain and the mist – and so the river dies.'“ (Learn more)

An example from Germany shows that such dangers are also a reality here: In 2022, a strictly protected wild stream in the Rappenalp Valley, located within the „Allgäu High Alps“ nature reserve, was dredged by representatives of two alpine cooperatives over a length of 1.5 kilometers. The measure—according to the operators, a response to flooding—irreversibly destroyed the biotope. Behind this lies a technocratic approach to flood protection: water is supposed to drain away as quickly as possible. But the negative consequences of this short-term solution are imposed on third parties—for example, areas downstream or future generations. The real problem is not solved this way. This is also referred to as externalization (German blogpost). But true sustainable protection means giving rivers space (Learn more) (Learn more).

Robert Macfarlane accompanies people who advocate for „their“ river—whether as an ecological system or as a living organism, as seen in many Indigenous cultures. In several countries, nature—and specifically rivers—has already been granted legal personhood with its own rights—a significant milestone. Because when this idea is enshrined in a constitution, the destruction of nature or a river becomes a legal violation with real consequences. In the meantime, the rights of nature have been embedded in the constitution of Ecuador (Learn more).

Article 71 states:

„Nature, or Pacha Mama, where life is reproduced and occurs, has the right to integral respect for its existence and for the maintenance and regeneration of its life cycles, structure, functions and evolutionary processes.“

Article 74 states:

„Persons, communities, peoples, and nations shall have the right to benefit from the environment and the natural wealth enabling them to enjoy the good way of living.“ (Learn more)

In Canada, the Mutehekau Shipu (Magpie River) was granted constitutional rights, as was the Whanganui River in New Zealand. There, the Te Awa Tupua Act was passed in 2017. It states (Learn more):

„Te Awa Tupua is an indivisible and living whole from the mountains to the sea, incorporating the Whanganui River and all of its physical and metaphysical elements.“ (Chapter 12)

„Te Awa Tupua is a legal person and has all the rights, powers, duties, and liabilities of a legal person.“ (Chapter 14)

If nature—or even rivers—were granted the status of a legal person with its own rights under the German constitution, interventions such as the destruction in the Rappenalp Valley could be regarded as direct violations of the river’s rights and sanctioned accordingly. Such legal status would allow the river—represented by authorized individuals—to bring cases to court and demand comprehensive protection from human interference.

These developments show that it is indeed meaningful to understand rivers as living entities within the web of life. Indigenous perspectives play a crucial role in this. They are based on deep experiential knowledge—many communities have lived in close relationship with their river for generations. When the river is destroyed, they lose not only their livelihoods but also their spiritual connections.

This worldview can enrich ecological debates. The growing global recognition of nature as a legal subject could become a powerful tool in future environmental proceedings.

That’s why my suggestion is this: Let us bring Indigenous perspectives more strongly into our conversations about the future of our shared environment—and let us learn from them, wherever it is possible and meaningful to do so.

A river flows behind a bush and two small trees. The photo was taken in early summer, and the leaves are a bright green. In the foreground, the leaves of low-growing plants on the ground lead into the frame, like a green carpet.
River and Forest in the Wutach Gorge.

And the Danube?

We began this river journey with an excursion into the geological past of the Danube. Along the way, we saw that the catchment area of this river system has become progressively smaller over time. This development appears to be ongoing and is likely to continue in the future (Learn more).

One phenomenon that makes this process visible is the Danube Sinkhole near Immendingen. The water that disappears from the Danube at this point flows underground through karst rock to the Aachtopf, where it resurfaces as a spring. From there, it flows as the Radolfzeller Aach into Lake Constance (and from there to the Rhine river). This phenomenon illustrates how the Rhine, with its lower-lying catchment area, is increasingly diverting water away from the Danube—a process known as river capture.

In addition, it is assumed that a stream currently draining into the Wutach near Blumberg—the Schleifenbächle—will gradually carve its way northeastward toward the Danube Valley through the Aitrach Valley, due to headward erosion. As a result, the Danube will likely be diverted toward the Rhine near Geisingen at some point in the distant future. By then, the city of Donaueschingen might need a new name.

But all of this is likely to unfold far beyond the temporal scope of what we humans can observe or control.

Many thanks to the fluvial morphologist Thomas Fleischhacker for his helpful comments and the generous sharing of his Expertise.

This article was originally written in German. The English version was translated with the assistance of AI and subsequently revised for clarity and accuracy.