Lake Sediments Used to Quantify the Erosional Response to Land Use Change in Southern Sweden

Dearing, John A.; Persson, Arne; Widholm, D.; El-Daoushy, Farid; Håkansson, Håkan; Liedberg-Jonsson, B.; Skansjö, S.

doi:10.2307/3565402

Cited by 85 publications

(50 citation statements)

References 33 publications

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“…As inferred above, the yield for the San Pedro watershed has a mean of 0Á5 t ha À1 a À1 for the past 50 years. By comparison, in a small forested basin in south England, with a mean rainfall of 674 mm, erosion rate averaged 0Á2 t ha À1 a À1 in the 20th century (Foster et al, 1985); around a Swedish lake, sediment yield increased from 0Á05 t ha À1 a À1 under natural conditions to 0Á5 t ha À1 a À1 in the 20th century (Gaillard et al, 1991a); and at another Swedish lake, medieval deforestation increased the sediment yield from 0Á25 to 0Á86 and 2Á5 t ha À1 a À1 (Dearing et al, 1987). The sediment yield around San Pedro Lake also resembles yields estimated from lake deposits in Mexico.…”

Section: Sediment Yield Comparison With Other Watershedsmentioning

confidence: 99%

“…This simplified approach, from Dearing et al (1987) and Dearing (1991), depends on three assumptions stated in the Methods section. We made the computations for the top 10 cm of the core, which according to our 210 Pb dating corresponds to the time between 1942 and 1996.…”

Section: Sediment Yieldmentioning

confidence: 99%

“…To estimate sediment yield from the watershed, we considered a method proposed by Dearing (Dearing et al, 1987;Dearing, 1991). In its simplest form, this method is based on three assumptions that are not necessarily valid for Chica de San Pedro Lake: (1) the sedimentation rate does not vary with location in the lake; (2) all the sediment supplied by the watershed is deposited in the lake, no sediment is stored in transit; (3) all the sediment deposited in the lake, organic as well as inorganic, comes from in the watershed, none of the sediment is produced within the lake itself.…”

Section: Calculation Of Sedimentation Rates and Sediment Yieldmentioning

confidence: 99%

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Effects of historical land use on sediment yield from a lacustrine watershed in central Chile

Cisternas¹,

Araneda²,

Martínez³

et al. 2001

Earth Surf. Process. Landforms

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Sediment yield in the San Pedro Lake watershed, inferred from sedimentation in the lake, can be related to land use changes shown on aerial photographs taken during the period 1943-1994. In this watershed, which covers 4Á5 km 2 of mountainous terrain in San Pedro County, central Chile, the area of native forest species decreased from 70 per cent in 1943 to 13 per cent in 1994. During this same period, the area of pine plantations increased from 4 to 46 per cent. To study effects of these changes, we took a core from the centre of the lake and estimated sedimentation rates by 210 Pb dating, which we checked with 137 Cs and pine pollen. The results show that sedimentation rate ranged from 5 mg cm À2 a À1 in the late 1800s to 60 mg cm À2 a À1 in the late 1960s. These rates, together with assumptions about the production and delivery of the sediment, give corresponding figures for sediment yields with maximum values close to 1 t ha À1 a À1 . Sediment yield between 1955 and 1994 closely tracks the total land use change that can be detected, irrespective of land use type, on sets of aerial photographs taken four to 18 years apart. However, this measure of land use change, while convenient and successful as a predictor of historical erosion, may be unreliable because it probably excludes many changes that occurred in long intervals between successive photographs.

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Section: Sediment Yield Comparison With Other Watershedsmentioning

confidence: 99%

Section: Sediment Yieldmentioning

confidence: 99%

Section: Calculation Of Sedimentation Rates and Sediment Yieldmentioning

confidence: 99%

See 1 more Smart Citation

Effects of historical land use on sediment yield from a lacustrine watershed in central Chile

Cisternas¹,

Araneda²,

Martínez³

et al. 2001

Earth Surf. Process. Landforms

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show abstract

“…Increasingly, research based on long-term monitoring (i.e. decades) of suspended sediment fluxes, sediment budget studies and reconstructed sediment yields from depositional environments (such as lakes and reservoirs) is showing that fine-grained sediment fluxes (especially fine sediment delivery to rivers and sediment transport in rivers) are generally increasing throughout the world in catchments that are impacted by human activities, such as deforestation, agriculture, construction and mining activities (Wolman and Schick, 1967;Trimble, 1983;Dearing et al, 1987;Soutar, 1989;Dedkov and Mozzherin, 1992;Walling, 1995;Foster and Lees, 1999;Walling and Fang, 2003;Owens, 2005a). Human activity may be directly or indirectly responsible for 80-90% of the fluvial sediment delivered to the coastal oceans (Farnsworth and Milliman, 2003).…”

Section: Fine-grained Sediment: Quantity and Quality Issuesmentioning

confidence: 99%

Fine‐grained sediment in river systems: environmental significance and management issues

Owens

Batalla

Collins

et al. 2005

River Research & Apps

558

294

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Fine-grained sediment is a natural and essential component of river systems and plays a major role in the hydrological, geomorphological and ecological functioning of rivers. In many areas of the world, the level of anthropogenic activity is such that fine-grained sediment fluxes have been, or are being, modified at a magnitude and rate that cause profound, and sometimes irreversible, changes in the way that river systems function. This paper examines how anthropogenic activity has caused significant changes in the quantity and quality of fine-grained sediment within river systems, using examples of: land use change in New Zealand; the effects of reservoir construction and management in different countries; the interaction between sediment dynamics and fish habitats in British Columbia, Canada; and the management of contaminated sediment in USA rivers. The paper also evaluates present programmes and initiatives for the management of fine sediment in river systems and suggests changes that are needed if management strategies are to be effective and sustainable.

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“…Numerous studies have demonstrated the effects of land-use change on erosion and sediment loading patterns in aquatics ecosystems ( Dearing et al, 1987;O'Hara et al, 1993;Alin et al, 1999;. Increased sedimentation has detrimental impacts on biodiversity and ecological integrity in aquatic communities (Detenbeck et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

Landuse Effects on Cirhanyobowa River Water Quality in D.R. Congo

Bagalwa¹,

Karume²,

Bayongwa³

et al. 2013

GJBS

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Cirhanyobowa River in D.R. Congo, is extensively used as washing and drinking water source by surrounding population as well as by gorillas. The study was carried out in three sites on Cirhanyobowa River to evaluate the effect of landuse (forest, mining and agricultural) on Cirhanyobwa River water quality. Surface water temperature, DO, BOD5, nitrogen and phosphorus were measured, and aquatic macroinvertebrates collected monthly for a period of one year and measured according to standards analytical and biological methods. Results have shown changes in water quality for the forest, mining and agricultural sites but slight changes in number of taxa at the forested and mining sites with respectively 43 and 42 species; and significant changes in agricultural site with 27 species. Chemical and physical parameters measured at the three sites did not seem sufficient to account for all observed differences in macroinvertebrate communities, suggesting some unmeasured toxicity. It was established that there is water quality deterioration along Cirhanyobwa River due to surrounding population anthropogenic activities.

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Lake Sediments Used to Quantify the Erosional Response to Land Use Change in Southern Sweden

Cited by 85 publications

References 33 publications

Effects of historical land use on sediment yield from a lacustrine watershed in central Chile

Effects of historical land use on sediment yield from a lacustrine watershed in central Chile

Fine‐grained sediment in river systems: environmental significance and management issues

Landuse Effects on Cirhanyobowa River Water Quality in D.R. Congo

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