检索结果-南通市图书馆

Cultivated Land Changes and Their Driving Forces——A Satellite Remote Sensing Analysis in the Yellow River Delta,China

引用

Pedosphere 2004年第1期14卷 93-102页

作者： ZHAOGeng-Xing G.LIN J.J.FLETCHER C.YUILL CollegeofResourcesandEnvironment ShandongAgriculturalUniversityTaian271018（China） RegionalResearchInstitute WestVirginiaUniversityMorgantownWV26505-6300（USA）

Taking Kenli County in the Yellow River Delta, China, as the study area and using digital satellite remote sensing techniques, cultivated land use changes and their corresponding driving forces were explored in this study. An interactive interpretation and a manual modification procedure were carried out to acquire cultivated land information. An overlay method based on classification results and a visual change detection method which was supported by land use maps were employed to detect the cultivated land changes. Based on the changes that were revealed and a spatial analysis between cultivated land use and related natural and socio-economic factors, the driving forces for cultivated land use changes in the study area were *** results showed a decrease in cultivated land in Kenli County of 5321.8 ha from 1987 to 1998, i.e.,an average annual decrement of 483.8 ha, which occurred mainly in the central paddy field region and the northeast dry land region. Adverse human activities, soil salinization and water deficiencies were the driving forces that caused these cultivated land use changes.

关键词： cultivated land driving force satellite remote sensing the yellow riverdelta

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Utilizing Landsat TM Imagery to Map Greenhouses in Qingzhou, Shandong Province, China

引用

Pedosphere 2004年第3期14卷 363-369页

作者： ZHAOGeng-Xing LIJing LITao YUEYu-De T.WARNER CollegeofResourcesandEnvironment ShandongAgriculturalUniversityTai＇an271018（China） SoilandFertilizerWorkingStationofShandong Jinan250100（China） AgricultureBureauofQingzhouCity Qingzhou262500（China） DepartmentofGeologyandGeography WestVirginiaUniversityMorgantownWV26505-6300（USA） CollegeofResourcesandEnvironment ShandongAgriculturalUniversityTai＇an271018（China）

To build a rapid and accurate method for greenhouse vegetable landinformation extraction using an index model derived from TM digital data of Qingzhou City, ShandongProvince, based on a systematic analysis of the spectral characteristics of different land use typesin the study area, a subset of the image was first made to eliminate the mountainous region notassociated with vegetable distribution, and then water body pixels were masked. With this the V_Iindex model for greenhouse vegetable land extraction was developed. The index model indicatedgreenhouse vegetable land for Qingzhou in April 2002 was concentrated in the southeast and aroundrural residential areas. Field data used for an accuracy evaluation showed that greenhouse hectaresdetermined with remote sensing were 95.9% accurate, and accuracy for the spatial distribution ofgreenhouse vegetable land cross checked with a random sample was 96.3%. Therefore, this approachprovided an effective method for greenhouse vegetable land information extraction and has potentialsignificance for management of greenhouse vegetable production in the study area, as well as NorthChina.

关键词： greenhouse vegetable land information extraction qingzhou city TM image

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Thoughts on Integrated Monitoring of Ecological Environment at Provincial Level

引用

水土保持研究 2004年第2期11卷 27-32页

作者： PENGHong JackE.Coster SONGXiao-qiang ShaanxiProvincialBureauofSoilandWaterConservation Xi＇an710004China westvirginiauniversity MorgantownWestVirginiaU.S.A.

The Law of Soil and Water Conservation entitles the administrations of water resources at various level to monitor ecological environment and to proclaim status of soil erosion *** units of soil and water conservation approved by local governments are obliged to undertake this *** to develop a monitoring program needs an overall and long-term *** and objectives of ecological environment monitoring was discussed. Monitoring at provincial level may be divided into two levels:province-wide and at project level. Those indicators meaningful,sensitive to any disturbances,and simple to measure may be selected to test status of ecosystem stability and *** makes sense to have an integrated sampling design,to set up permanent observation plots and to collect data, so that to have a relative timely,accurate understanding of ecosystems in the province.A program regarding sampling design,field methods, data analysis,documentation and implementation was detailed.

关键词： ecological environment province wide monitoring project level sampling design implementation program

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：