送交者: Gaia 于 2005-4-15, 15:13:49:
Full Record
Record 4 of 9 (Set #6)
Title: Cs-137 tracing of lacustrine sediments in the Dalian Lake, Qinghai Province, China
Author(s): Ping Y, Dong GG, Dong ZB
Source: CHINESE SCIENCE BULLETIN 46: 83-87 Suppl. S, DEC 2001
Document Type: Article
Language: English
Cited References: 27 Times Cited: 0
Abstract: Based upon the analysis of Cs-137 and grain-size parameters, the total amounts of Cs-137
deposition by wind and water in the Dalian Lake of Gonghe Basin, Qinghai Province are defined. The
vertical profile Of Cs-137 in the lacustrine sediments exhibits three Cs-137 activity maxima and one
minimum. The major maximum corresponds to the global 137Cs fallout in 1963; the two secondary
maxima correspond to the leakage of the Chernobyl reactor in 1986 and complete desiccation of the lake
in 1994, respectively. The minimum corresponds to aeolian deposition caused by extensive reclamation in
the late 1980s and early 1990s. The Cs-137 data set was used to evaluate average sedimentation rate of
the Dalian Lake since 1963. The deposition was stable in 1963-1986 and 1994-1998, and it was rapid
during 1986-1994. This preliminary study reveals that Cs-137 has the same potential to trace
environmental changes introduce by human interference in arid/semiarid regions as in humid regions.
Author Keywords: Cs-137 technique; Dalian Lake; sedimentation rate
KeyWords Plus: RADIOACTIVE FALLOUT CESIUM-137; SOIL-EROSION; REDISTRIBUTION; WIND
Addresses: Ping Y (reprint author), Beijing Normal Univ, China Ctr Desert Res, Beijing, 100875 Peoples R
China
Beijing Normal Univ, China Ctr Desert Res, Beijing, 100875 Peoples R China
Beijing Normal Univ, Key Lab Environm Change & Nat Disaster, Minist Educ China, Beijing, 100875
Peoples R China
Chinese Acad Sci, Cold & Arid Regions Environm & Engn Res Inst, Lanzhou, 730000 Peoples R China
Publisher: SCIENCE CHINA PRESS, 16 DONGHUANGCHENGGEN NORTH ST, BEIJING 100717, PEOPLES R
CHINA
Full Record
Record 5 of 9 (Set #1)
Title: Cs-137 dating of lacustrine sediments and human impacts on Dalian
Lake, Qinghai Province, China
Author(s): Yan P, Shi PJ, Gao SY, Chen L, Zhang XB, Bai LX
Source: CATENA 47 (2): 91-99 APR 2 2002
Document Type: Article
Language: English
Cited References: 38 Times Cited: 2
Abstract: Cs-137 and grain-size analyses indicate the total amounts of Cs-137
deposited by wind and water in the Dalian Lake of Gonghe Basin, Qinghai
Province. The vertical profile of Cs-137 in the lacustrine sediments shows three
Cs-137 activity peaks and one trough: the main peak corresponds to the global
Cs-137 fallout in 1963: the two secondary peaks correspond to the leakage of the
Chernobyl reactor in 1986 and complete desiccation of the lake in 1994. The
trough corresponds to aeolian deposition caused by extensive reclamation of
farmland in late 1980s and early 1990s. The Cs-137 dating was used to evaluate
sedimentation rates in Dalian Lake since 1963. They are divided into three
periods: two with slow deposition (1963-1986 and 1994-1998), and one with rapid
deposition (19861994). Cs-137 seems to have the same potential for indicating
environmental changes and human interference in the and and semiarid regions as
in humid regions. (C) 2002 Elsevier Science B.V. All rights reserved.
Author Keywords: Cs-137 technique; Dalian Lake; sedimentation rate; aeolian
sand; human activities
KeyWords Plus: RADIOACTIVE FALLOUT CESIUM-137; SOIL REDISTRIBUTION;
SOUTHWEST NIGER; EROSION; RATES
Addresses: Yan P (reprint author), Beijing Normal Univ, Minist Educ China, Key
Lab Environm Change & Nat Disaster, 19 Xinjiekouwai St, Beijing, 100875 Peoples
R China
Beijing Normal Univ, Minist Educ China, Key Lab Environm Change & Nat Disaster,
Beijing, 100875 Peoples R China
Beijing Normal Univ, China Ctr Desert Res, Beijing, 100875 Peoples R China
Sichuan Univ, Dept Phys, Chengdu, 610064 Peoples R China
Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu, 6410041 Peoples R
China
Publisher: ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM,
NETHERLANDS
Subject Category: AGRICULTURE, SOIL SCIENCE; GEOSCIENCES,
MULTIDISCIPLINARY; WATER RESOURCES
IDS Number: 531FB
ISSN: 0341-8162