共查询到20条相似文献,搜索用时 287 毫秒
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《自然资源学报》1987,2(4):381-384
第1期关于海滦河平原的缺水和引水问题······················……:·········&;#183;····&;#183;·······················……黄让堂等(l)农业水资源配置效果的计算分析··········“···一·”··”·····‘…….”一,’’·.........······一··,·…刘昌明杜伟(9)广东省海岸带国土资原的开发和管理·········“················一·“····“····&;#183;,.·············……徐君亮刘军(2。)红树林及其土坡·····&;#183;·····”·”·············”··········· 相似文献
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《自然资源学报》1989,4(4):381-384
第1期依靠科学技术进步,努力把旱作农业区的生产提高到一个新水平··················……郑重(1)黄土高原旱地农业自然生产力潜势评价··························……;..·············……张沁文等(4)建立开放系统,发展西北半干旱地区农业·······································……‘··……刘霎浩(垃)西北黄土高原半干旱一半湿润地区旱作农田降水生产潜力及开发途径·········……王立祥等(19)以山西为中心的能源基地的资源开发······································· 相似文献
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《自然资源学报》1993,8(4):381-384
第1期红壤丘陵森林生态系统矿质元素循环的计算机模拟·············································……李飞(1)天山北坡中段天然草场牧草产量遥感动态监测模式·························一黄敬峰桑长青冯振武(10)浙江省草山草坡的特点及开发利用战略-以常山县为例····································……何绍箕(18)江苏东沙的资源及开发潜力·············”·····一···一···················一·························……蒋炳兴(26)藏北 相似文献
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《自然资源学报》2005,20(6):947-1000
第1期资源利用与资源管理塔里木河下游第五次应急输水后地下水恢复量的计算……………………杨鹏年董新光吾买尔江(1)北方城市干涸河流区域资源管理与环境整治模式--以滹沱河石家庄市区段生态恢复与重建模式为………………………………………………………………………………例常青李洪远何迎(7)松辽流域水资源区域补偿对策研究……………………………………………………秦丽杰邱红(14)水管理:理论及手段………………………………………………………………………………沈大军(20)阿克苏河流域径流补给及径流变化特征分析…………………………………蒋艳周成虎程维明(27)中国耕地资源数量变化的趋势分析与数据重建:1949~ 相似文献
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《自然资源学报》1990,5(4):385-388
第1期、尹护、、少‘、了、,、Jr、J产℃,声、户2中国干旱区径流的形成及转化·························,……我国淡水湖泊资源开发探讨—以东平湖为例·····……吉林省天然矿泉水资源基本特征与开发战略········……试论攀钢基地的矿产资源体系·、························……赣江流域山丘荒地的形成、危害和开发途径··········……黄土高原主要农作物水分盈亏与雨养农业问题·····……用筑后模型估算我国植物气候生产力···················,…系统决策与作物布局—徐州地区秋作物布局实例分析赣江流域丘陵山区资源经济结构梯度的数量 相似文献
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《环境科学学报(英文版)》1991,(4)
NO.l伪j吐ive al记qUan ti七吐i记巴.luation of ovnDnn祀”talq画itv of the lalldfor越州浏t眠purpose by Nil鹅E冶to咯w出笔Suf比and sunRuo化·········一气·························································……(l)陀roleurn场习成e bkx珠radat沁n with pomus bioll甘岛劝pports,哎助(PBSS)。nro以哪 biol卿司conta以。 byT扭n T.F~andC卜0绷如ury A.K.M.M.···································4······… 相似文献
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Fugitive road dust (FRD) contributes a great deal to urban rainwater and air pollution and is commonly controlled by water-sprinkling in most Chinese cities. However, there is a lack of information on its effectiveness. We used the Testing Re-entrained Aerosol Kinetic Emissions from Roads (TRAKER) method to monitor different types of roads in Baoding city before and within 1 hr after water-sprinkling and obtained the road dirtiness index (a) and PM concentration in the road environment (), to evaluate the removal efficiency for PM deposited on the road surface () and the reduction efficiency for the PM concentration in the road environment (). The results give that the for three types of roads is ranked: branch road (87%-–100%) > major arterial road (80%-83%) > minor arterial road (68%-77%), and the ranked: minor arterial road (70%) > branch road (46%-58%) > major arterial road (37%-53%). The and varied non-linearly with time and presented a quadratic curve. The average effective control time (> 0) was 62 min on the major and minor arterial roads, and much longer than 1 hr on branch roads. The values diminished completely by 72 min on average from the end of sprinkling for the three types of roads. Water-sprinkling can remove PM10 particles from the road surface and reduce their concentration in the road environment more thoroughly than PM2.5. Our findings could be helpful for controlling urban FRD emissions more efficiently and precisely. 相似文献
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