The impact of 500 kV transmission lines of Anqing power plant across the lake wetland reserve along the Yangtze River on the safety of the ecosystem was taken as the researched object.The power frequency electric fiel...The impact of 500 kV transmission lines of Anqing power plant across the lake wetland reserve along the Yangtze River on the safety of the ecosystem was taken as the researched object.The power frequency electric field intensity(PFEFI),power frequency magnetic field intensity(PFMFI),radio interference,construction noise,vegetation destruction and the influence on water quality were investigated and monitored,and the influences of PFEFI,PFMFI,radio interference and construction noise on wild animals,especially the habitats and migration of birds were mainly researched.The direct and indirect influences on the surrounding environment as well as plants and animals in sensitive areas were analyzed and predicted.The results firstly showed there existed a 182 400m^3 stereo-space(PFEFI>4kV/m)which made flying birds unsafe under the lowest height 11 mof the lines,which fills the gap in the research of this field.Finally,some operational protection countermeasures were put forward at the current technical level to achieve the win-win goal of economic development and natural protection.展开更多
The fluctuation of lake levels in Tibetan area may be well reflected by the landformevidences, especially the last highest lake levels. This, in a certain degree, is more suitable fordetermning the climatic humidity a...The fluctuation of lake levels in Tibetan area may be well reflected by the landformevidences, especially the last highest lake levels. This, in a certain degree, is more suitable fordetermning the climatic humidity and aridity in macro scale compared with many other indicatorswhich are also sensitive to the sedimentary environmental change. According to the analyses of thelakes such as Tianshuihai Lake, Bangdag Co, Lungmu Co, Bangong Co, Serfing Co, Chabyer Caka,Qahan salt lake, Qinghai lake, the lake group in north-east Qiangtang and the lake group in southTibet. the authors thought that the lakes on the Tibetan Plateau generally appeared the high lakelevel during 40-25 ka BP. The plenty of water quantity may represent a special warm-humid stage inTibet area compared with the sub-warm-humid stage reflected by marine oxygen isotope records.Thus, there may existed different driving factors to climatic changes between the high latitUde areasand middle-low latitude mountains.展开更多
Assessment of the current status of Lake Baikal proved to be based on changes in natural (“preindustrial”) chemical content in basic abiotic and biological compartments of the Lake geosystem. This approach was used ...Assessment of the current status of Lake Baikal proved to be based on changes in natural (“preindustrial”) chemical content in basic abiotic and biological compartments of the Lake geosystem. This approach was used to evaluate background “base-line levels” of 6 major and about 50 minor and trace ele-ments in the Lake Baikal water body using a number of most reliable data re-ported within 1992-2012. In terms of environment geochemistry Baikal is one of the purest water reservoirs on the Earth. A simple mass balance model was proposed for assessing possible anthropogenic impact on Baikal water geo-chemistry. Estimations of change trends showed that only for Na+, SO42-, Cl- and Mo growth rate of their average concentrations in the Lake occurred to be 1%, 3%, 7% and 2% in every 10 years. Space-time monitoring schedules for all water body compartments of the Lake are proposed as well as similar moni-toring programs for tributaries, precipitations, bottom sediments, aquatic biota.展开更多
基金Supported by the Provincial Governmental Foundation for Forestry of Anhui Province in 2013(2136203)
文摘The impact of 500 kV transmission lines of Anqing power plant across the lake wetland reserve along the Yangtze River on the safety of the ecosystem was taken as the researched object.The power frequency electric field intensity(PFEFI),power frequency magnetic field intensity(PFMFI),radio interference,construction noise,vegetation destruction and the influence on water quality were investigated and monitored,and the influences of PFEFI,PFMFI,radio interference and construction noise on wild animals,especially the habitats and migration of birds were mainly researched.The direct and indirect influences on the surrounding environment as well as plants and animals in sensitive areas were analyzed and predicted.The results firstly showed there existed a 182 400m^3 stereo-space(PFEFI>4kV/m)which made flying birds unsafe under the lowest height 11 mof the lines,which fills the gap in the research of this field.Finally,some operational protection countermeasures were put forward at the current technical level to achieve the win-win goal of economic development and natural protection.
文摘The fluctuation of lake levels in Tibetan area may be well reflected by the landformevidences, especially the last highest lake levels. This, in a certain degree, is more suitable fordetermning the climatic humidity and aridity in macro scale compared with many other indicatorswhich are also sensitive to the sedimentary environmental change. According to the analyses of thelakes such as Tianshuihai Lake, Bangdag Co, Lungmu Co, Bangong Co, Serfing Co, Chabyer Caka,Qahan salt lake, Qinghai lake, the lake group in north-east Qiangtang and the lake group in southTibet. the authors thought that the lakes on the Tibetan Plateau generally appeared the high lakelevel during 40-25 ka BP. The plenty of water quantity may represent a special warm-humid stage inTibet area compared with the sub-warm-humid stage reflected by marine oxygen isotope records.Thus, there may existed different driving factors to climatic changes between the high latitUde areasand middle-low latitude mountains.
文摘Assessment of the current status of Lake Baikal proved to be based on changes in natural (“preindustrial”) chemical content in basic abiotic and biological compartments of the Lake geosystem. This approach was used to evaluate background “base-line levels” of 6 major and about 50 minor and trace ele-ments in the Lake Baikal water body using a number of most reliable data re-ported within 1992-2012. In terms of environment geochemistry Baikal is one of the purest water reservoirs on the Earth. A simple mass balance model was proposed for assessing possible anthropogenic impact on Baikal water geo-chemistry. Estimations of change trends showed that only for Na+, SO42-, Cl- and Mo growth rate of their average concentrations in the Lake occurred to be 1%, 3%, 7% and 2% in every 10 years. Space-time monitoring schedules for all water body compartments of the Lake are proposed as well as similar moni-toring programs for tributaries, precipitations, bottom sediments, aquatic biota.
