CLIMATIC AND ANTHROPIC EFFECTS ON MECHANI CAL EROSION IN A TEMPERATE AREA CRYSTALLINE MOUNTAIN DURING LATE-GLACIAL AND HOLOCENE PERIODS - EXAMPLE OF THE LAKE CHAMBON WATERSHED (MASSIF-CENTRAL, FRANCE)

Authors
MACAIRE JJ BOSSUET G CHOQUIER A COCIRTA C DELUCA P DUPIS A GAY I MATHEY E GUENET P
Citation
Jj. Macaire et al., CLIMATIC AND ANTHROPIC EFFECTS ON MECHANI CAL EROSION IN A TEMPERATE AREA CRYSTALLINE MOUNTAIN DURING LATE-GLACIAL AND HOLOCENE PERIODS - EXAMPLE OF THE LAKE CHAMBON WATERSHED (MASSIF-CENTRAL, FRANCE), Comptes rendus de l'Academie des sciences. Serie II. Mecanique, physique, chimie, astronomie, 320(7), 1995, pp. 579-585
Citations number
31
Categorie Soggetti
Multidisciplinary Sciences
Journal title
Comptes rendus de l'Academie des sciences. Serie II. Mecanique, physique, chimie, astronomie → ACNP
ISSN journal
12518069
Volume
320
Issue
7
Year of publication
1995
Part
2
Pages
579 - 585
Database
ISI
SICI code
1251-8069(1995)320:7<579:CAAEOM>2.0.ZU;2-M
Abstract
Mechanical erosion rates in the Lake Chambon watershed have been calcu lated from the volumes of detritic sediments stored in two lacustrine depressions which functioned from 12.6 to 8.5 ka BP on one hand and si nce 2.6 ka BP on the other. Natural variations of climate and vegetati on during Bolling-Allerod, Younger Dryas and Preboreal-Boreal induced variations of mechanical erosion rates by a factor 2.5 (respectively 4 9 +/- 15, 120 +/- 36 and 79 +/- 24 m(3) km(-2) a(-1)). While climatic conditions were about the same during the whole final Subboreal and Su batlantic, deforestation by man induced a threefold increase of mechan ical erosion for 14 centuries (from 56 +/- 17 to 166 +/- 50 m(3) km-2 a(-1)).