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检索条件"任意字段=海峡两岸环境与资源学术研讨会暨中国环境资源与生态保育学会会员代表大会"

共 147 条记录，以下是131-140 订阅

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Adapting RUSLE and GIS to Model Soil Loss in Yishusi River Catchment,China

Adapting RUSLE and GIS to Model Soil Loss in Yishusi River C...

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海峡两岸三地环境与资源学术研讨会暨第二届中国环境资源与生态保育学会会员代表大会

作者： JING Guanghua~(1,2),YU Xingxiu~(1,3),LIU Qianjin~1 1.School of Chemistry Resource,Linyi Normal University,27600 Linyi,P.R.China 2.School of population,resource and environment,Shandong Normal University,250014 Jinan,P.R.China 3.Shandong provincial key laboratory of soil and water conservation and environmental protection,276005 Linyi,P.R.China

The remote sensing and GIS are applied to evaluate the soil erosion risk in the northern part of *** study integrated the revised universal soil loss equation(RUSLE) with RS and GIS techniques to assess soil loss and identify risk erosion areas in the Yishusi River *** results show that more than half of the catchment fall within minimal erosion category and the moderate erosion area is nearly located in the Yimeng Mountain *** potential soil loss indicates that management practice should be taken to reduce the soil *** all,the results of the study compare well with the other studies and local data,and provide useful information for decision makers and planners to take appropriate land management measures in the *** thus indicates that the RUSLE-GIS model is a useful tool for evaluating and mapping soil erosion quantitatively and spatially in Yishusi River catchment.

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Ecological Security Assessment on Ecotypes Zones and Countermeasures of the Ecologic Restoration in Mamas River Basin over the past 30 Years

Ecological Security Assessment on Ecotypes Zones and Counter...

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海峡两岸三地环境与资源学术研讨会暨第二届中国环境资源与生态保育学会会员代表大会

作者： WANG Yue-jian~(1,a),XU Hai-liang~(2,b) 1.Department of Geography,Shihezi University,Xinjiang Shihezi 832003 & School of Geographical Sciences,Southwest University,Chongqing,400715 2.Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences,Xinjiang Urumqi 830011

There are different Ecological Zones in respect to the geographical area of arid zone river basin, Ecological Security Problem in different Ecological Zones of arid river basin are to be on the *** Mamas River Basin as an example,this paper developed an Eco-Security Evaluation indicator system for the four Ecological zones of the upper,middle and lower reaches of the river,and carried out evaluations of the Ecological Security from 1976 to 2006 accordingly with the support of GIS and other *** result shows that,during the past 30 years,the Ecological Security of the mountainous regions in the upper reaches,the oasis agricultural regions in the middle and lower reaches,and the desert regions in the lower reaches partially decreased,especially the oasis agricultural regions in the middle and lower reaches where there was the minimum degree of security,while that in urban regions in the middle reaches *** Scological Security problems are becoming apparent in Mamas River *** restore the Ecological Environment in the Manias River Basin,The author reported countermeasures mat we should take water resources reasonably exploited as main handhold and the upper,middle and lower reaches of the River Basin should be comprehensively controlled.

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Vertical Change of the Soil Erosion and its Controlling Factors from 1986 to 2005 in Linyi Country,China

Vertical Change of the Soil Erosion and its Controlling Fact...

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海峡两岸三地环境与资源学术研讨会暨第二届中国环境资源与生态保育学会会员代表大会

作者： LIU Qianjin~(a,b),YU Xingxiu~(a,b) a.School of Chemistry and Resources Environment,Linyi Normal University,276005 Linyi,P.R.China b.Shandong Provincial Key Laboratory of Soil and Water Conservation and Environmental Protection, 276005 Linyi,P.R.China

Taking the Linyi country,one of the most representative area of the Rocky Area of Northern China,as a case study,supported by the technology of GIS&RS and the data of Landsat TM image and relief map,this study aim to interpret the spatial distribution of soil erosion and its influence factor index,including the land use index,mean vegetation cover and mean slope,in vertical dimension from 1986 to *** shows that the change of the mean slope had the similar trend to that of soil erosion index,increasing dramatically bel6w the belt of 8,and then decreasing slightly above the belt of *** erosion index,land use index and mean vegetation in 1986 and 1996 had the same change trend in vertical dimensions,but that of 2005 were quite *** results indicated that the slope factor determined the vertical distribution of the soil erosion *** land use index became more important from 1986 to 2005,with as higher occupation as 25.4%of the total contribution in *** the land use constructor is one of most important methods to control soil erosion.

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Effect of Contour and Down-slope Tillage Methods on the Eutrophication Risk in Runoff Water

Effect of Contour and Down-slope Tillage Methods on the Eutr...

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海峡两岸三地环境与资源学术研讨会暨第二届中国环境资源与生态保育学会会员代表大会

作者： YUXingxiu~a,MA Qian~b a.School of Chemistry and Resources Environment,Linyi Normal University,Shandong Key Laboratory of Soil Conservation and Environmental Protection,Linyi 276005,China b.College of Resources and Environment,Huazhong Agricultural University,Wuhan 430070,P.R China

Field simulated rainfall experiment with 40 mm·h intensity was carried out at typical sloping cropland in Yimeng mountainous area,was designed to analyze the differences of NO-N,NH-N and P concentrations in runoff water with the intention of observing possible eutrophication risks in this water,in contour and *** showed that contour can effectively reduce the runoff as compare to down-slope *** concentration of DP（Dissolved Phosphorus） in runoff water was higher in contour than in down-slope tillage,while the concentrations difference of NO-N,NH-N between the two tillage methods were not *** N/P ratios in runoff water produced by contour and down-slope tillage suggest a certain eutrophication risk in water,which show an increasing trend within the rainfall process. Compared with down-slope tillage,contour can not only hinder the increasing trend of eutrophication risk, but also can significantly lower the risk level,and thus effectively reduce die effect of agricultural runoff on eutrophication.

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Researches on Heavy Metals Accumulation of Greening Trees Species in Lanzhou City

Researches on Heavy Metals Accumulation of Greening Trees Sp...

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海峡两岸三地环境与资源学术研讨会暨第二届中国环境资源与生态保育学会会员代表大会

作者： DU Zhong~(1,3),REN Jun~2,TAO Ling~2 1 Institute of Mountain Hazards and Environment,Chinese Academy of Sciences,P.R.China,610041 2 School of Environmental and Municipal Engineering of Lanzhou Jiaotong University,P.R.China,730070 3 Graduate University of Chinese Academy of Sciences,P.R.China,100049

The atmospheric heavy metals pollution is one of the most serious problems that obsessing the world urban *** application of greening tree species to absorb the heavy metals in the atmosphere is an important method in the atmospheric pollution *** order to select monitoring and effective greening tree species to purify the heavy metals pollution,four common greening tree species in five selected polluted areas are chosen to measure the heavy metals *** concentration of heavy metals in tree species leaves was obviously associated with the heavy metals properties,pollution conditions and tree species *** potential Pb accumulation capacity of different greening tree species appeared in the order of Sabina chiesis>Sophora japonica>Buxus microphylla>Populus *** for Cu,the accumulation capacity can be ranked as Sabina chiesis>Populus tomentosa>Sophora japonica>Buxus *** tomentosa had the highest accumulation capacity for Cd,While Sophora japonica for ***,the overall degree of atmospheric heavy metals pollution in the investigated areas can be shown as follows:XiGuan>Rubber plant>Petroleum plant>Xizhan>*** results can offer theoretical practices for the management of air pollution in Lanzhou city.

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Change of Soil Surface Roughness of Splash Erosion Process

Change of Soil Surface Roughness of Splash Erosion Process

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海峡两岸三地环境与资源学术研讨会暨第二届中国环境资源与生态保育学会会员代表大会

作者： ZHENG Zicheng~(a,b,d),HE Shuqin~c,WU Faqi~d a.College of Resources and Environment,Sichuan Agriculture University,P.R.China,625014 b.The State Key Laboratory of Earth Surface Processes and Resource Ecology,P.R.China,610041 c.College of Forestry,Sichuan Agriculture University,P.R.China,625014 d.College of Resources and Environment,Northwest Agricultural and Forestry University,P.R.China, 712100

Soil surface roughness is one of the main factors that affect soil erosion in slope *** further determine the effects of soil surface roughness on soil splash *** changes of soil surface roughness of splash erosion process were obtained on the single and combined rainfall intensity based on the artificial rainfall simulation *** results showed that the soil surface roughness increased on the contrast and the raking cropland slope,change of soil surface roughness to the other slope decreased and the splash erosion amounts to the contrast slope were lower than those of other slopes under the rainfall intensity of 0.62 mm/*** soil surface roughness decreased on the contrast slope,the change of soil surface roughness to other slope showed increasing trends and the splash erosion amounts to the contrast slope were lower than those of other slopes under the rainfall intensity of 1.50 mm/*** the combined rainfall intensity,soil surface roughness of raking cropland was consistent with change of the contrast slope with the increasing rainfall *** the change of soil surface roughness to the raking cropland slope increased,and the change of soil surface roughness increased first and then decreased for other slope with the increasing rainfall *** results provide theory basis for revealing the erosion nature of soil surface roughness,and at the same time,it would serve for harnessing soil and water loss of the slope farmland.

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台北县淡水镇虚拟实境地理教学平台之开发

台北县淡水镇虚拟实境地理教学平台之开发

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海峡两岸环境与资源学术研讨会暨中国环境资源和生态学保育学会会员代表大会

作者：蔡元芳黃姿榕台北教育大学社会科教育学系所

随著电脑科技的快速发展,人类世界进入了E世代,而原来昂贵的器材,因为标上了平民化的价格,也预告著亲近科技并运用其来解决问题的时代来临。而身负著教育重责大任的教育工作者们,若能自由地运用这样的媒介来创造与认识属于生活周遭的教... 详细信息

随著电脑科技的快速发展,人类世界进入了E世代,而原来昂贵的器材,因为标上了平民化的价格,也预告著亲近科技并运用其来解决问题的时代来临。而身负著教育重责大任的教育工作者们,若能自由地运用这样的媒介来创造与认识属于生活周遭的教材,并发展出各种新式的教学模式与学生互动,将会为教学环境注入创意的新血,也能在成长、摸索的孩子们心中,洒下各式各样体验科技及认同情感建立的种子。本研究即是在这种背景之下,希望将资讯科技应用在教学及生活上,建置一个虚拟实境地理资讯平台,提供教师一个落实教学理念及设计之管道。因此,本研究希望将虚拟实境及地理资讯系统的结合,透过先进的科技将校园围墙外美丽的家乡带进教室来,为教学者省去了户外教学规划所遇到的困境,另一方面,也让学生在安全的环境中认识自己的家乡,甚至透过虚拟的互动设计,去体认到曾发生在自己生长土地上的人、事、时、地、物。本研究首先透过地理资讯系统(GIS)建置研究区域之文化、自然环境资料库,其次将之整合于虚拟实境互动软体中,再藉著网际网路的无远弗届之特性,及第三代的行动通讯的形成,将整个自然、人文环境透过3D虚拟实境之空间结构界面呈现出来,以提供教学者之用,期使使用者更能完整的取得所要求的地理资讯。本研究的具体成就,包含将整合虚拟实境相关技术并结合最新的科技技术3S(GPS卫星定位系统、GIS地理资讯系统及RS航照底图)与客制化的专用系统,以建立虚拟实境互动型GIS时空分析及学习环境。其借助了虚拟实境的拟真及互动功能,以及地理资讯系统强大的展示及分析模组,期能让学习地理融入虚拟实境互动中,让亲临其境之感带来教育性及趣味性。并以实际的‘淡水镇-马偕之路'地理教材应用案例,证明前述虚拟实境与地理资讯系统整合之资讯平台其合理性与可行性。让当前大多停留在纸本教学的地理科教学,能有更具体的可操作的实境互动学习环境,研究之成果期能作为未来相关教育单位在发展乡土地理教育课程之基础。

关键词：虚拟实境地理资讯系统地理教学

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Non-Point Source Pollution Reduction by Filter Strips in Water and Soil Environment

Non-Point Source Pollution Reduction by Filter Strips in Wat...

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海峡两岸三地环境与资源学术研讨会暨第二届中国环境资源与生态保育学会会员代表大会

作者： Roy R.Gu Mahesh Sahu College of Environmental Sciences and Engineering South China University of Technology Department of Civil Construction and Environmental EngineeringIowa State Univ.AmesIA 50010USA

Contour filter strips planted with perennial vegetation can be used to improve surface and ground water quality by reducing pollutant,such as N03-N,and sediment outflow from cropland to a river or lake. Meanwhile,the filter strips of perennial grass with bio-fuel potentials also have economic benefits of producing *** this study,The Soil and Water Assessment Tool（SWAT） model was applied to the Walnut Creek Watershed to examine the effectiveness of contour strips in reducing NO-N outflows from crop fields to the river or *** input data include watershed topography,slope,soil type,land-use, management *** the watershed and climate parameters（precipitation,maximum/minimum air temperature,solar radiation,wind speed and relative humidity）.Numerical experiments were conducted to identify potential subbasins in the watershed that have high water quality impact,and to examine the effects of strip size and location on NO-N reduction in the subbasins under various meteorological conditions（dry, average and wet）.Variable sizes of contour strips（10%,20%,30%and 50%,respectively,of a subbasin area） planted with perennial switchgrass were selected for simulating the effects of strip size and location on stream water *** results showed that a filter strip having 10%-50%of the subbasin area could lead to 55%-90%NO3-N reduction in the subbasin during an average rainfall *** occupying 10-20%of the subbasin area were found to be more efficient in reducing NO-N when placed along the contour than that when placed along the *** results of this study can assist in cost-benefit analysis and decision-making in best water resources management practices for environmental protection.

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Absorption and Accumulation of Heavy Metals for Phyllostachys pubescens in Catchment of Southern Jiangsu Province

Absorption and Accumulation of Heavy Metals for Phyllostachy...

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海峡两岸三地环境与资源学术研讨会暨第二届中国环境资源与生态保育学会会员代表大会

作者： TAO Bao-xian~(1,2,3),ZHANG Jin-chi~(1**) 1.College of Forestry Resources and Environment,Nanjing Forestry University,Nanjing 210037,China 2.College of Chemistry,Resources & Environment,Linyi Normal University,Linyi 276005,China 3.Key Laboratory of Water,Soil Conservation and Environmental Protection,Linyi 276005,China.

The studies were carried out on the absorption and accumulation of heavy metals in the hilly region of Southern Jiangsu *** results showed that:the forest soil in studied areas was not been polluted,owing to forest's function of accumulating heavy *** content of Zn was bigger man other 4 heavy metals in the organs of Phyllostachys *** total storage of heavy metals were Zn>Cu>Pb>Ni>*** the enrichment coefficient of heavy metals were *** annual uptake of Cr, Cu,Ni,Pb,Zn for Phyllostachys pubescens were 29.19g/hm,278.31g/hm,89.44g/hm,87.43g/hm, 184.69g/hm respectively,annual return of Cr,Cu,Ni,Pb,Zn for Phyllostachys pubescens were 5.79g/hm, 25.84g/hm,5.12g/hm,42.06g/hm,172.56g/hm respectively,and the turnover period of Cr,Cu,Ni,Pb,Zn was 5、11、17、2、11a for Phyllostachys *** to the results of assessment,the Phyllostachys pubescens has lower enrichment coefficient,it has better ability to absorb and accumulate heavy metals in soil,owning to the bigger biomass and productivity.

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Study on Nutrients Release at Water-Substrate Interface of Constructed Wetland in Estuary Zone of Xinxue River,Nansi Lake,China

Study on Nutrients Release at Water-Substrate Interface of C...

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海峡两岸三地环境与资源学术研讨会暨第二届中国环境资源与生态保育学会会员代表大会

作者： LI Bao~(1,2*),HU Xianghui~3 1.Shandong Provincial Key Laboratory Of Water and Soil Conservation & Environmental Protection, Shandong Province,P.R.China,276000 2.School of Chemistry and Resources Environment,Linyi Normal University,Shandong Province,P.R. China,276000 3.The Human Resources Department,Linyi Normal University,Shandong Province,P.R.China,276000.

The substrate and in-situ overlying water of the riparian zones in Xinxue River were used to simulate nitrogen and phosphorus release through static incubation of sediment cores by controlling DO and diferent *** results showed that the wetland substrate was the sink of nitrogen and phosphorus for the overlying water,and the substrate had better characteristics in adsorption of ammonian（NH-N） and total phosphorus（TP） under the aerobic condition and alkaline *** intensity of substrate NH-N and TP adsorption was directly linear to the pH *** non-aerobic condition,the NH-N and TP adsorption fluxes were 52 and -0.15 mg/m.d（minus represents source）,and after aerating,the NH-N and TP fluxes increased to 95 and 0.69 mg/*** change of pH value and oxidation-reduction potential was one of the prime reasons on nitrogen and phosphorus release at water-substrate interface in Xinxue River wetland.

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