290 pages, 212 b/w illustrations, 1 table
This thought-provoking book demonstrates how processes of landscape transformation, usually illustrated only in simplified or idealized form, play out over time in real, complex landscapes. Trimble illustrates how a simple landscape disturbance, generated in this case by agriculture, can spread an astonishing variety of altered hydrologic and sedimentation processes throughout a drainage basin. The changes have spatial and temporal patterns forced on them by the distinctive topographic structure of drainage basins.
For the natural scientist, Historical Agriculture and Soil Erosion in the Upper Mississippi Valley Hill Country illustrates how an initially simple alteration of land cover can set off a train of unanticipated changes to runoff, erosion, and sedimentation processes that spread through a landscape over decades-impoverishing downstream landscapes and communities. Distinct zones of the landscape respond differently and in sequence. The effects take a surprisingly long time to spread through a landscape because sediment moves short distances during storms and can persist for decades or centuries in relatively stable forms where it resists further movement because of consolidation, plant reinforcement, and low gradients.
" [...] a story of tragedy and triumph. [...] The tragedy was the severe damage inadvertently inflicted on the landscape, by well-intentioned settlers doing the best that they could with the tools and knowledge available to them. The triumph has been the landscape's partial recovery, thanks to the efforts of private citizens and government agencies. The story of the Upper Mississippi River Hill Country is rich in lessons for understanding and managing many other landscapes."
– Jared Diamond, Professor of Geography at UCLA, and Pulitzer-Prize-winning author of Guns, Germs and Steel, Collapse, and other best-selling books
"[Trimble's book] is based on almost four decades of dedicated research and has many of the characteristics of a gripping detective story, based on meticulous forensic investigation. [...] The geomorphologist will learn much from the complexity of stream processes that is evident and from the linkages that occur in different parts of river basins between erosion and deposition [...] an exemplification of true Geography [...] [a] remarkable work"
– From the Foreword by Andrew Goudie, Professor Emeritus and former Head, School of Geography, University of Oxford
" [...] intensive, loving field work and reflection. Thanks to clear maps and diagrams, and above all a wealth of well documented photographs, we can all grasp the painful dimension of what in less able hands would be a lifeless tale of mud and dereliction. [...] [a] powerful book [...] and a tribute to dogged, dispassionate enquiry."
– Claudio Vita-Finzi, Natural History Museum, London; Professor of Geology Emeritus, University College London
"Professor Trimble's exceptionally well documented accounts of agricultural landscape disturbance have had a broad impact on the field of geomorphology. In this rich and detailed environmental history of the Upper Mississippi Valley Hill Country, he has broadened the scope to include the human side of the story, describing the social and individual actions that triggered pervasive watershed disturbance with unintended but profound impact on those living and working on the landscape. This is a compelling and delightfully readable narrative [...] . Future efforts to sustainably manage this and other agricultural land will require mastery of its combined human and natural history, amply documented and effectively explained, as done so ably in this definitive work."
– Peter R. Wilcock, Professor and Associate Chair, Department of Geography and Environmental Engineering, Johns Hopkins University
"An epoch-defining work on the evolution of landscapes under the influences of changing agricultural practices and on the episodic movement and storage of fluvial sediment. Stan Trimble not only draws deeply on a century and a quarter of previous history, but adds nearly four decades of his own observations (both intensive and extensive) to round out an inspiring chronicle of good science in the service of good stewardship."
– Robert H. Meade, USGS Emeritus
The Physical Region and Primeval Landscape
Vegetation and Soils
European Settlement and Changes of Land Use
Overview of Historical Agriculture in the Region
Historical Crops and Other Agricultural Land Use
Grazing and Animal Husbandry
Land Use Management from the Time of Settlement to the 1930s
A Revolution in Agricultural Land Management
The Continuing Soil Conservation Revolution
A Composite of Erosive Land Use over the Historical Period
The Systematic Effects of Historical Agriculture on the Physical Landscape
The Role of Modified Hydrology (In Particular, the Role of Rills and Gullies)
Increasing Hydrologic Change and Soil Erosion in the Hill Country
Effects of Soil Conservation on the Physical Landscape
Sediment Budgets over the Historical Period
Zones of Physical Processes within Stream Basins of the Hill Country
Upper Main Valley (UMV)
Lower Main Valley (LMV)
Stream Erosion of High Terraces and High Banks
Upland Gully Erosion and its Effects
Hillside Gullies and Their Fans
The Appleby Farm
The Zink Farm
High Terrace Gullies and Their Fans
The Buffalo and Black River Terraces
The Peterson Event
The Tributaries: Zone of Early, Complex Changes of Process and Form
Other Locations and Functions
Farms and Farmsteads
Roads, Railroads, Bridges, and Communication Lines
Mills, Reservoirs, and Water Power
The Upper Main Valleys: Zone of Later Complex Changes of Process and Form
Coon Valley, Wisconsin
Farms and Farmsteads
The Lower Main Valleys: Zone of Perennial Sedimentation
Villages and Towns
Beaver and Whitewater Falls, Minnesota
Soldiers Grove and Gays Mills, Wisconsin
Galena, Illinois and Potosi, Wisconsin
Elkport and Garber, Iowa
Village Creek, Iowa
Farms and Farmsteads of the LMV
Roads, Bridges, and Communication Lines
Mills and Reservoirs
The Great Flood of August 2007 and its Implications
Upper Main Valley
Lower Main Valley
Sediment Yield or Efflux
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Stanley W. Trimble is a professor in the Department of Geography at the University of California, Los Angeles.