Abstract

This paper deals with the management of large rivers from systems theory and human ecology perspective. Natural systems, hierarchy and equilibrium have been widely discussed earlier on, but their relations with human-made structures and modifications on large rivers is a less covered area. One of the key statements in this field is Type One error, the inherent conflict between human-made structures and natural processes. The renewable energy concept, when applied to water resources, has some traps and misleading implications. In fact, renewable sources – including water – can also be depleted if their rate of replenishment is exceeded. Economy-driven river regulations and land use practices triggered a series of events where the system feedback of the river was not taken into account. As a result, the need for yet further manipulations and interference kept on returning, entailing even more and more costs, increased risks and destabilising natural systems. Sustainable river management takes a fresh look at the problem, with historical examples from places like the Carpathian Basin, Mesopotamia or citing recent practices from Thailand.

Highlights

  • Large rivers are complex natural systems consisting of both living and non-living components

  • The natural behaviour of large rivers can best be described with the help of system theory and the same approach may be useful in understanding the conflict between the dynamics of river processes and the rigid engineering structures imposed on them

  • The impeccable logic behind a Type one error in case of a river is that previous water management interventions such as cut of bends, low level river regulations, flood control measures, narrowing floodways, eroded riverbeds solicit more and more interventions in the same vein because the situation due to the positive feedback becomes untenable after a while

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Summary

Introduction

Large rivers are complex natural systems consisting of both living and non-living components. The natural behaviour of large rivers can best be described with the help of system theory and the same approach may be useful in understanding the conflict between the dynamics of river processes and the rigid engineering structures imposed on them. Human ecology theory is a way of looking at the interactions of humans with their environments and considering this relationship as a system. In this theoretical framework, biological, social, and physical aspects of the organism or society are considered within the context of their environments. The emerging new field of human ecology, in an attempt to reconcile natural systems with human made ones, and to make predictions about future human-environment interactions, draws boldly on the findings of general systems theory. Conclusions are drawn on how to use the insight into the contradiction of logic in both systems for the improvement of human-river interactions

Natural Systems
The Renewable Energy Concept
Technical Systems
Type one Error
The Hydrological Cycle
River Regulations
Consequences
Antagonistic Effects
Drought and Excess Water
Positive Feedback
Dams and Reservoirs
Adverse Effects
Examples
Ecosystem Services Lost
Business as Usual
Granulometric River Restoration
Restoration of Lost Ecosystem Services
Hydropeaking and the Restoration of the Ecologically Necessary Flow Patterns
The Ultimate Destiny of Lowland Dams
Maintenance and Operation
Principles
Floodplain Economy: ‘Fok Management’ in the Carpathian Basin
Keylines
Mesopotamia
Muang Faai
Findings
Conclusions
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