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Sediment change under climate changes and human activities in the Yuanjiang-Red River Basin

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science Bulletin 2007年第S2期 164-171页

作者： HE DaMing~(1+) REN Jing~(1,2) FU KaiDao~1 LI YunGang~1 1 Asia International Rivers Center of yunnan university,kunming 650091,china 2 college of tourism and geography science,yunnan normal university,kunming 650092,china

Both the climate change and human activities are the major Influence factors to the sediment change In mountainous *** on the over 40 years' record,suspended sediment loads（SSL）change at the Manheo gauging station in the lower reaches of Yuanjiang River（upper Red River）.In this paper,the variation of the sediment and its drivers were analyzed through different methods such as synchronous data comparison,traditional correlation,linear regression,and Granger *** results show that （1）the general trend of the annual average sediment concentration（SSC）and SSL at Manheo station is increasing from the 1960s to the 1990s,and there is a quick change period after 1984;（2）the SSL and SSC at Manhao station,during different periods of the 1960s,1970s,1980s and 1990s,are 1.87,2.49, 3.12,3.63 kg/m3,and 28.7×10～6,40.3×10～6,44.1×10～6,60.3×10～6 t/a,respectively;（3）the correlation analysis end the Granger causality test proved that the climate changes in the catchment were the main driving factors to the sediment variation in the period of 1960s and 1990s,but the influence by the mountain- ous human actions on the sediment change is stronger than that by the local climate changes in the 1970s and 1980s;（4）the correlation between the sediment changes and the forest coverage change is negative,which further proves that the sediment changes are strongly affected by the human activities in the basin.

关键词： sediment change Granger causality test Yuanjiang River the Longitudinal Range-Gorge Region

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论乡村旅游的文化特性

思想战线 2002年第6期28卷 36-39页

作者：李伟云南师范大学旅游与地理科学学院云南昆明650031

乡村旅游是一种具有田园观光、乡土民俗感受及休闲度假性质的"复合式旅游产品",其文化特性包含有深厚淳朴的传统文化和宁静自然的田园生态文化,深入研究其文化内涵,不仅可以大力开发这一旅游产品市场,而且对传统文化的传承,加强城乡交... 详细信息

乡村旅游是一种具有田园观光、乡土民俗感受及休闲度假性质的"复合式旅游产品",其文化特性包含有深厚淳朴的传统文化和宁静自然的田园生态文化,深入研究其文化内涵,不仅可以大力开发这一旅游产品市场,而且对传统文化的传承,加强城乡交流与沟通,理解传统与现代特质都有积极意义。

关键词：乡村旅游农业观光民俗文化传统与现代

Landscape Change and its effect on the environment of Daqing City

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Progress in Natural science:Materials International 2005年第7期15卷 641-649页

作者： ZANG Shuying, ZHANG Jing and JIA Li ( college of Life and Environment science, Harbin normal university, Harbin 150080, china college of Resources Environment & tourism, Capital normal university, Beijing 100037, china college of Economics and Management, Northeast Agricultural university, Harbin 150030, china) college of Life and Environment science Harbin Normal University Harbin 150080 China. college of Resources Environment & tourism Capital Normal University Beijing 100037 China. college of Economics and Management Northeast Agricultural University Harbin 150030 China

In this paper, we will study the temporal-spatial landscape change from 1978 to 2001 in Daqing City, based on the mul- ti spectral scanner (MSS) and thematic mapper (TM) images of remote sensing (RS) of 1978, 1988, 1992, 1996 and 2001. In order to explain the effects of the component change on the whole landscape, we make a statistic analysis about the transfer probability matrix of the component types of the landscape by using the ARCGIS platform through the overlay analysis of different landscape components. Based on the transfer probability matrix, we calculate the in-transfer ratio, the out-transfer ratio and the contributor ratio of the special transfer process of the main landscape components. The results illustrate that the cultivated-land, grassland, swamp, and alkaline land are the main contributors resulting in the landscape change: the out-transfer ratios of grassland and swamp are much higher than the in-transfer ones; the in-transfer ratio of alkaline land is much higher than the out-transfer one; the in-transfer ratio of the land-lot is always higher than its out-transfer with the highest rate per year, although there is a small difference among the in-transfers and the out-transfers per year. The main landscape changing processes are the salination of cultivated-land, salination or desertification of grassland, salination and degeneration of swamp. Results in this paper can provide scientific basis for investigating the landscape change mechanism of resources-based city.

关键词： landscape change environmental effect transfer probability resources-based city.

Cloning, sequencing and expression of the coat protein gene of Cocksfoot mottle virus

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Progress in Natural science:Materials International 2007年第2期17卷 222-225页

作者： DONG Zhi, GUO Xiaoyu, ZHANG Hailong and ZHANG Feiyun ( college of Life science, Capital normal university, Beijing 100037, china college of Resources Environment and tourism, Capital normal university, Beijing 100037, china Beijing Key Laboratory for Resources Environment and geography Information System, Beijing 100037, china) [a]college of Life science Capital Normal University Beijing China [b]college of Resources Environment and tourism Capital Normal University Beijing China [c]Beijing Key Laboratory for Resources Environment and geography Information System Beijing China

The coat protein (CP) gene of Cocksfoot mottle virus (CfMV) was amplified by RT-PCR and inserted into expression vector pGEX-4T-1, and the resulting plasmid was designated as pGEXCfMV-JANCP. The fusion protein GST-CP was expressed in BL21 (DE3) pLysS after IPTG induction. The results of SDS-PAGE and Western blot analysis showed that the CfMV-CP gene was efficiently expressed in E. coli BL21 (DE3) pLysS through IPTG induction and the 56.0 kD protein was obtained.

关键词： Cocksfoot mottle virus sequence analysis prokaryotic expression.

Land Use/Land Cover Change(LUCC) and Eco-Environment Response to LUCC in Farming-Pastoral Zone,china

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Agricultural sciences in china 2009年第1期8卷 91-97页

作者： HAO Hui-mei and REN Zhi-yuan college of tourism and Environmental science,Shaanxi normal university,Xi’an 710062,P.R.china [a]college of tourism and Environmental science Shaanxi Normal University Xi'an 710062 P. R. China

In order to understand land use/land cover changes （LUCC） and the eco-environment response to LUCC in farming- pastoral zone of the northern china during the recent twenty years, Baotou prefecture was selected as a case study area for investigation and quantitative evaluation. Technologies of remote sensing （RS）, global positioning system （GPS）, geographic information system （GIS）, and other statistical methods were employed to implement. Results showed that：（1） During the recent twenty years, the areas of forest lands, grasslands and water were reduced, whereas the areas of other types were enlarged. Parts of forest lands, grasslands, and waters had become farmlands, and about 31.5% of the changed grasslands transferred into unused lands. The newly increased farmlands mainly came from grasslands and unused lands. And the newly increased construction lands mainly came from grasslands and farmlands. （2） Regional eco- environmental quality decreased by 12.6%, for which the land degradation （especially the meadow degeneration） and the developing of the cultivated land were mainly responsible, and their contributions to the regional eco-environment changes were 51.84 and 23.63% respectively. （3） The tendency of LUCC and the eco-environment response to LUCC displayed spatial heterogeneity. It can be concluded that the present agricultural production mode was not sustainable in farming-pastoral zone of northern china. Land degradation, especially meadow degradation induced by over-trampling and overgrazing, and developing of cultivated land were mainly responsible for regional eco-environment deterioration. Changing the cultivated land to forest or grass, however, can relieve deterioration of local eco-environment to some extents. And in the farming-pastoral zone in the northern china, evaluating regional eco-environment responses to LUCC was very necessary due to its fragile eco-environments.

关键词： farming-pastoral zone LUCC eco-environment responses to LUCC

Cross-shore suspended sediment flux in the salt marsh pioneer zone of Chongming eastern beach in the Chang- jiang Estuary in china

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Acta Oceanologica Sinica 2010年第6期29卷 62-72页

作者： WANG Chu YAO Dongjing HE Baogen ZHOU Naisheng XU Shiyuan Department of geography Shanghai Normal University Shanghai 200234 China Department of geography College of Resource and Environmental Science East China Normal University Shanghai 200062 China

Between April 2002 and April 2003,in situ measurements of water depth,current velocity and suspended sediment content were carried out in edge region of East Chongming salt marsh and neighboring bald flat in the Changjiang （Yangtze） Estuary under different weather ***-shore suspended sediment flux was calculated and *** results show that under calm weather conditions,the current velocity process in bald field and salt marsh area varied differently during semidiurnal tidal *** to current velocity asymmetry,mean SSC during flood tide phase was 1.8 times higher than that of ebb tide *** a result,net onshore sediment flux controlled cross-shore suspended sediment transport process and salt marsh pioneer zone was generally *** was significant positive correlation between total sediment flux and quartic power of maximum water *** indicates that tidal ranges dominate suspended sediment transport and sedimentation process in the salt marsh pioneer zone under the calm weather *** sedimentation rate on the adjacent mudflat was higher than the salt marsh,which induced stable accreting of salt marsh towards the *** wind events enhanced SSC and current velocity during the semidiurnal *** the remarkable onshore net sediment flux could occur on the high marsh and mudflat close to the marsh fringe during the short period under the rough weather condition.

关键词： current velocity suspended sediment content flux salt marsh eastern beach

Retrieving crop leaf area index by assimilation of MODIS data into a crop growth model

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science china Earth sciences 2010年第5期53卷 721-730页

作者： WANG DongWei1,2,3, WANG JinDi1,2 & LIANG ShunLin4 1 State Key Laboratory of Remote Sensing science, Jointly Sponsored by Beijing normal university and Institute of Remote Sensing Applications, CAS, Beijing 100875, china 2 School of geography, Beijing Key Laboratory of Environmental Remote Sensing and Digital City, Beijing normal university, Beijing 100875, china 3 Haihe River Water Conservancy Commission, Tianjin 300170, china 4 Department of geography, university of Maryland, college Park, MD 20742, USA 1. State Key Laboratory of Remote Sensing science Jointly Sponsored by Beijing Normal University and Institute of Remote Sensing Applications CAS Beijing 100875 China2. School of Geography Beijing Key Laboratory of Environmental Remote Sensing and Digital City Beijing Normal University Beijing 100875 China3. Haihe River Water Conservancy Commission Tianjin 300170 China4. Department of Geography University of Maryland College Park MD 20742 USA

Leaf area index (LAI) is an important parameter in monitoring crop growth. One of the methods for retrieving LAI from remotely sensed observations is through inversion of canopy reflectance models. Many model inversion methods fail to account for variable LAI values at different crop growth stages. In this research, we use the crop growth model to describe the LAI changes with crop growth, and consider a priori LAI values at different crop growth stages as constraint information. The key approach of this research is to assimilate multiple canopy reflectance values observed at different growth stages and a priori LAI values into a coupled crop growth and radiative transfer model sequentially using a variational data assimilation algorithm. Adjoint method is used to minimize the cost function. Any other information source can be easily incorporated into the inversion cost function. The validation results show that the time series of MODIS canopy reflectance can greatly reduce the uncertainty of the inverted LAI values. Compared with MODIS LAI product at Changping and Shunyi Counties of Beijing, this method has significantly improved the estimated LAI temporal profile.

关键词： inversion leaf area index crop growth model time series MODIS

Study on Water Consumption Coefficient of People's Living and Its Regional Disparity in the North of china

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Chinese Journal of Population,Resources and Environment 2005年第2期3卷 20-26页

作者： Wang Jing’ai 1-3, Mao Rui 3,4, Yang Mingchuan 3,4 & Zhou Junju 11 college of geography & Remote Sensing 2 Key Laboratory of Regional geography of Beijing normal university 3 Key Laboratory of Environmental Change and Natural Disaster of Ministry of Education of china 4 college of Resources science & Technology, Beijing normal university, Beijing 100875, china college of geography and Remote Sensing Beijing 100048 China Key Laboratory of Environmental Change and Natural Disaster of Ministry of Education of china Beijing 100048 China college of Resources science and Technology Beijing Normal University Beijing 100875 China

By employing the information-reshufflingmethod that integrates census data, precipitation dataand inquiry data of water consumption, this paperdiscusses 5 (water consumption coefficient of people’sliving) in allusion to different precipitation zones anddifferent periods of time. The study shows that 5-(water consumption coefficient of urban people’sliving), 5. (water consumption coefficient of ruralpeople’s living) and increase with time passing, andthe increasing extent of 5 is 1.84, 2.62, 2.84 and 2.68times respectively from the west to the east, whichresults from the total quantity of water resources andthe speed of urbanization. 5- and 5. of eachprecipitation zone increased with 5- increasing morequickly than 5., and the difference between the twoalso increased when time passed. In the past fifty years(1950-2000), the increasing extent of 5- was 1.71,2.96, 2.41 and 2.33 times respectively from the westto the east, in which 200-400mm precipitation zoneincreased more than others. Meanwhile the increasingextent of 5. is 1.55, 1.60, 1.53 and 1.64 timesrespectively from the west to the east with eachprecipitation zone increasing similarly. The change of5-is due to the speed of urbanization and the stabilityof water resources. This study provides basis forcalculating the water demand of people’s living andrevealing the impact of water demand of people’s livingon ecological drought in different zones.

关键词： The north of china precipitation zone water consumption coefficient of people’s living

山地高梯度森林生物质能效应研究(Ⅰ):研究方法

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山地学报 2011年第4期29卷 409-416页

作者：明庆忠郭树荣角媛梅云南师范大学旅游与地理科学学院云南师范大学高原地理过程与环境变化云南省重点实验室

中国是一个山地占2/3的国度。山地因其垂直高差产生了自然与人文现象随高差变化梯变的高梯度效应,森林及其生物质能也呈现出梯变现象。以滇西北梅里雪山极高山地为实证点,尝试综合应用森林生物量及生产力、地理信息技术﹑生物地理统计... 详细信息

中国是一个山地占2/3的国度。山地因其垂直高差产生了自然与人文现象随高差变化梯变的高梯度效应,森林及其生物质能也呈现出梯变现象。以滇西北梅里雪山极高山地为实证点,尝试综合应用森林生物量及生产力、地理信息技术﹑生物地理统计等方法,建立山地森林生物质能资源高梯度效应研究模式,有助于正确认识山地三维地貌体产生的高梯度效应,更好认识山地生物质能分布规律并加以合理利用,创建优良人居环境。

关键词：高梯度效应山地森林生物质能研究方法