1) Urban district of Yan an
延安城区
3) Yan'an region
延安地区
1.
Although water has the central function of the bloodstream in the biosphere,especially in arid or semi-arid regions such as Yan'an region in Northwest China,yet very limited attention is paid to the role of the water-related processes in ecosystem.
根据延安地区各气象站点连续30年的气象资料和各土肥站点连续10年的土壤含水实测资料,通过经验模型、实地观测和GIS空间分析相结合的方法,提出了干旱半干旱地区植被—土壤复合系统的最小生态需水量、适宜生态需水量和饱和生态需水量三种阈值模式的较为准确的计算方法,并从时空角度定量分析评价区域生态需水量和生态缺水量。
2.
In this article,choose Yan'an region as an example,adopt the methods of ecological security and ecological footprint,and evaluate the sustainability of region development.
文章选择延安地区为实证案例,采用生态安全与生态足迹方法评价区域发展的可持续性。
4) Yan'an city
延安市区
1.
Optimization of MSW treatment schemes by fuzzifying mathematics in Yan'an city;
应用模糊数学方法对延安市区生活垃圾处理方案的优选
2.
The content of heavy metal Pb,Cr,Cd,Hg in compostable refuse were researched with one-year monitoring in Yan'an city,which could be contrasted to different standard values.
对延安市区生活垃圾可堆腐物中的重金属元素Pb、Cr、Cd、Hg、As的含量进行了为期1年的监测研究,得到上述元素在不同采样时间的含量,并与各类标准相对比,通过分析重金属元素的污染程度及其含量的变化趋势,计算出各个元素的等标污染负荷比,得出不同采样时间的主要污染物,并分析了污染元素的主要来源。
5) Yan an area
延安地区
1.
In this paper,five issues of 11 agricultural counties in Yan an area are studied,which include the total area change of farmland and seeding;the change of planting structure;the change of agricultural investment;the total and average output changes of grain and oil plants;the change of per farmer income per year.
对延安地区11个农业县退耕前后耕地/播种总面积、种植业结构、农业投入、粮食、油料产量与单产量以及农民年均纯收入的变化进行了研究,探讨了退耕还林对延安地区农业经济的影响及其作用机制。
6) Yan an forest region
延安林区
1.
Clustering analysis of rodent communities in Yan an forest region;
延安林区啮齿动物群落的聚类分析
2.
Eight species under 2 families and 6 genera of the geocole rodents were discovered in Yan an forest region.
延安林区共有地栖鼠类 8种 ,分属 2科 6属。
补充资料：“水是生命”(北京西城区阜成门大街上的宣传牌)
“水是生命”(北京西城区阜成门大街上的宣传牌)
“水是生命”‘北京西城区阜成门大街上的宣传牌)罗锡鹤摄
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条