PMID- 19765805
OWN - NLM
STAT- MEDLINE
DCOM- 20091127
LR  - 20100125
IS  - 1879-1026 (Electronic)
IS  - 0048-9697 (Linking)
VI  - 407
IP  - 23
DP  - 2009 Nov 15
TI  - Decadal and seasonal scale changes of an artificial lake environment after 
      blocking tidal flows in the Yeongsan Estuary region, Korea.
PG  - 6063-72
LID - 10.1016/j.scitotenv.2009.08.031 [doi]
AB  - Artificial lakes, initially built in estuaries for positive purposes such as 
      flood prevention and providing irrigation water, have been found to have negative 
      impacts including blocking tidal cycles, disappearance of brackish water zones, 
      sediment increase, water pollution, change of microbial diversity inhabiting 
      patterns, and a decline in fish diversity. In this study, multidisciplinary field 
      studies including physical, chemical, and biological analyses were performed to 
      demonstrate decadal and seasonal scale changes in the ecological environment in 
      Yeongsan Reservoir (YSR), Korea, since the construction of a 4.35 km-long dam in 
      1981. The results of the study show that the volume of sediment accumulated in 
      YSR was 75.2 million m(3) since the dam was constructed, resulting in a 33.6% 
      reduction of the total water storage capacity. Also, water quality in YSR was 
      affected by complex physico-chemical and hydrological phenomena, including saline 
      and thermal stratifications, and pollutant loadings leading to eutrophication. 
      Subsequent sediment bacteria analyses showed microbial diversity according to 
      different depths in sediment, indicating the environmental change of sediment 
      ecology. Moreover, the fish diversity in this study (2006-2007) was found to be 
      considerably reduced compared to a similar study in 1989 (42% reduction), and the 
      ecological health was deemed to be in a "poor" condition based on the 10-metric 
      Lentic Ecosystem Health Assessment (LEHA) model. Accordingly, these results 
      indicate that aquatic ecosystems are detrimentally affected by estuarine dams 
      that block tidal flows, and when applied to short/long-term management strategies 
      for artificial lakes in estuaries, suggest that similar construction projects 
      have to be suitably controlled.
FAU - Lee, Young Geun
AU  - Lee YG
AD  - Department of Environmental Science and Engineering, Gwangju Institute of Science 
      and Technology, Gwangju, Republic of Korea.
FAU - An, Kwang-Guk
AU  - An KG
FAU - Ha, Phuc Thi
AU  - Ha PT
FAU - Lee, Keun-Young
AU  - Lee KY
FAU - Kang, Joo-Hyon
AU  - Kang JH
FAU - Cha, Sung Min
AU  - Cha SM
FAU - Cho, Kyung Hwa
AU  - Cho KH
FAU - Lee, Yun Seok
AU  - Lee YS
FAU - Chang, In Seop
AU  - Chang IS
FAU - Kim, Kyoung-Woong
AU  - Kim KW
FAU - Kim, Joon Ha
AU  - Kim JH
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20090918
PL  - Netherlands
TA  - Sci Total Environ
JT  - The Science of the total environment
JID - 0330500
SB  - IM
EIN - Sci Total Environ. 2009 Dec 20;408(2):445. Kimj, Joon Ha [corrected to Kim, Joon 
      Ha]
MH  - Animals
MH  - Biodiversity
MH  - Ecosystem
MH  - Fishes
MH  - *Fresh Water
MH  - Geologic Sediments
MH  - Republic of Korea
MH  - *Seasons
EDAT- 2009/09/22 06:00
MHDA- 2009/12/16 06:00
CRDT- 2009/09/22 06:00
PHST- 2009/02/04 00:00 [received]
PHST- 2009/08/14 00:00 [revised]
PHST- 2009/08/24 00:00 [accepted]
PHST- 2009/09/22 06:00 [entrez]
PHST- 2009/09/22 06:00 [pubmed]
PHST- 2009/12/16 06:00 [medline]
AID - S0048-9697(09)00797-9 [pii]
AID - 10.1016/j.scitotenv.2009.08.031 [doi]
PST - ppublish
SO  - Sci Total Environ. 2009 Nov 15;407(23):6063-72. doi: 
      10.1016/j.scitotenv.2009.08.031. Epub 2009 Sep 18.