期刊文献+

二次检索

题名
关键词
文摘
作者
第一作者
机构
刊名
分类号
参考文献
作者简介
基金资助
栏目信息

年份

学科

共找到4篇文章
< 1 >
每页显示 20 50 100
Entire Catchment and Buffer Zone Approaches to Modeling Linkage Between River Water Quality and Land Cover——A Case Study of Yamaguchi Prefecture,Japan 被引量:3
1
作者 Bahman Jabbarian AMIRI Kaneyuki NAKANE 《Chinese Geographical Science》 SCIE CSCD 2008年第1期85-92,共8页
This study investigated the linkages between river water quality and land use in river catchments in Yama- guchi Prefecture, the western Japan, in order to examine the effect of land use changes of both entire catchme... This study investigated the linkages between river water quality and land use in river catchments in Yama- guchi Prefecture, the western Japan, in order to examine the effect of land use changes of both entire catchment and buffer zone on river water quality. Dissolved Oxygen (DO), pH, Biological Oxygen Demand (BOD), Suspended Solids (SS), Escherichia coli, Total Nitrogen (TN) and Total Phosphorus (TP) were considered as river water quality indica- tors. Satellite images were applied to generating the land use map. Multiple regression model was applied to linking the changes in the river water quality with the land uses in both entire catchment area and buffer zone. The results in- dicate that the integrative application of land use data from the entire catchment and the buffer zone could give rise to more robust model to predict the concentrations of Suspended Solids (r2=0.88) and Total Nitrogen (r2=0.90), rather than models which separately considered land use data in catchment and buffer zone. 展开更多
关键词 land use water quality buffer zone entire catchment Yamaguchi prefecture JAPAN
下载PDF
Comparing the soil quality changes of different land uses determined by two quantitative methods 被引量:17
2
作者 FUBo-jie LIUShi-liang 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2003年第2期167-172,共6页
Soil quality is one of the most important environmental factors in sustaining the global biosphere and developing sustainable agricultural practices. A study was initiated in Wolong Nature Reserve, Sichuan Province, C... Soil quality is one of the most important environmental factors in sustaining the global biosphere and developing sustainable agricultural practices. A study was initiated in Wolong Nature Reserve, Sichuan Province, China to elucidate the soil quality changes of natural secondary succession, forest planting and agricultural practices after deforestation in the humid mountainous region. The soil qualities of six land use types (natural forestland, grassland, shrub land, secondary forestland, cultivated land and reforested land) were compared using two quantitative methods: the integrated soil quality index(QI) and soil deterioration index(DI). The QI values of natural forestland, grassland, shrub land, secondary forestland, cultivated land, reforested land were 0.8039, 0.3277, 0.9127, 0.6881, 0.0285 and 0.3183, respectively. The DI values were 0%, -14%, 12%, 1%, -26% and -18% respectively. Both indexes suggested that shrub land can restore soil properties. To compare the two methods more directly, a deduced index QI′ based on QI value was developed. The results showed that DI and QI′had a very high linear correlation coefficient (r=0.9775) despite the values were different. Both methods were efficient in evaluating the soil quality levels and DI was a more simple way in soil quality assessment, while QI could show more ecological meanings. 展开更多
关键词 land use DEFORESTATION soil quality quantitative methods comprehensive evaluation Wolong
下载PDF
四川汶川-茂县河谷地区土地质量地球化学调查成果及其意义
3
作者 刘晓波 金立新 徐洲 《四川地质学报》 2024年第4期756-760,共5页
对四川阿坝州汶川茂县优选耕地区开展了土地质量地球化学评价工作,结果表明,研究区土地质量总体以无风险土壤为主,占总面积的86.69%。土壤养分总体呈丰富和较丰富状态,仅磷和钾在局部地区较缺乏;土壤环境质量整体良好;研究区土壤质量以... 对四川阿坝州汶川茂县优选耕地区开展了土地质量地球化学评价工作,结果表明,研究区土地质量总体以无风险土壤为主,占总面积的86.69%。土壤养分总体呈丰富和较丰富状态,仅磷和钾在局部地区较缺乏;土壤环境质量整体良好;研究区土壤质量以优质土壤为主,占全区面积的86.7%;研究区绿色食品产地、绿色富硒土地资源较丰富,分别有74 576亩和8 218亩。土地质量地球化学评价成果对土地利用、规划布局、发展现代农业、提高耕地质量等方面具有重要指导意义。 展开更多
关键词 地球化学评价 土地质量 富硒土地 四川阿坝州
下载PDF
六安地区土地质量评价研究 被引量:10
4
作者 王升堂 《安徽师大学报》 1997年第2期159-163,共5页
以乡镇为评价单元,选取耕地利用率,建设用地指数等八个参评因子,对全区188个评价单元的各参评因子按确定的指标进行评分,依据各参评因子权重计算出各评价单元的分值。
关键词 土地质量评价 土地利用 土地资源 土地管理
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部