污染物在地下水毛细饱水带的运移规律浅释

分析了毛细饱水带的水动力学特性，指出在地下水污染研究中，污染物在毛细饱和水带和潜水怪具有相同的水平运动规律，并以实例分析说明该带对污染物运移的重要性。建议在研究和一非饱和条件地下水及污染物运动问题时把毛细饱水带与潜水含水层统一为饱马毛细饱水带顶面作为饱水面。     

青铜峡铝厂氟污染对广武乡玉米影响的调查分析

监测了青铜峡铝厂东南方向４．５ｋｍ的广武乡玉米叶，得知含氟量为４３．９４－１６６．１ｍｇ／ｋｇ，对照样品树新林场玉米叶的含氟均值为１３．１５ｍｇ／ｋｇ，广武乡的玉米受到了严重的氟污染，农作物减产严重。     

塔里木油田环境空气质量状况及评价

根据塔里木油田１９９３－１９９６年环境空气监测数据，对其环境空气质量状况进行了分析和评价。     

柴油机尾气中PAH_s的分析

本文概述了柴油机尾气中ＰＡＨｓ的分析方法,着重论述了采样及预处理方法,特别对预处理方法进行了深入的探讨。另外,通过对柴油机两种不同工况下产生的尾气进行分析后发现,柴油机转速越高,其排放尾气中ＰＡＨｓ的含量就越低。     

小清河水体和沿岸地下水中有机污染物的监测及其毒性分析

本文对小清河水体和沿岸地下水中的有机污染物进行了色－质联用分析,共检出有机污染物１３类９３种。并对其毒性效应进行了分析和评价。     

汽车排气污染问题的探讨

本文主要研究了汽车排气对城市造成的污染危害，在对本市汽车保有量发展趋势现状调查的基础上，探讨了汽车排气污染问题的主要污染源和主要污染成分，以及汽车污染控制各个阶段的控制技术     

湿法吸收测定大气中的五氧化二磷

用２％ＮａＯＨ溶液吸收大气中的Ｐ２Ｏ５,用钼锑抗试剂显色定量。对样品的稳定性、方法的显色条件、精密度、准确度以及检出限进行反复试验,结果令人满意。     

湛江市寸金公园鸟类多样性与管理建议

2006年12月、2007年1—4月对湛江市寸金公园的鸟类资源状况进行了初步的研究,共记录到鸟类16种,隶属4目10科。其中,雀形目鸟类最多,共7科11种,约占总数的69%;其次为佛法僧目1科2种,约占总数的12.5%;鸡形目和鹃形目各1科1种,约占总数的6.25%。其中有国家Ⅱ级保护鸟类1种,占总数的6.25%。此外,属国家林业局发布的"国家重点保护的有益、有经济价值或有科学研究价值的动物"的鸟类7种,占总数的43.75%;被纳入省级重点保护鸟类的有2种,占总数12.6%;被纳入中澳候鸟协定鸟类的有1种,占总数的6.25%。     

浙东四明山红色旅游目的地的开发与建设

通过四明山红色旅游目的地开发建设的优势、机遇及劣势与挑战的分析,提出了开发与建设四明山红色旅游目的地的六大策略,即政府主导与市场运作相结合的开发策略、社会效益和经济效益兼顾的开发策略、红色旅游目的地品牌策略、"红绿结合"的开发策略、区域合作策略、基于和谐旅游发展的开发策略。     

Analyzing the Impacts of Dams on Riparian Ecosystems: A Review of Research Strategies and Their Relevance to the Snake River Through Hells Canyon

River damming provides a dominant human impact on river environments worldwide, and while local impacts of reservoir flooding are immediate, subsequent ecological impacts downstream can be extensive. In this article, we assess seven research strategies for analyzing the impacts of dams and river flow regulation on riparian ecosystems. These include spatial comparisons of (1) upstream versus downstream reaches, (2) progressive downstream patterns, or (3) the dammed river versus an adjacent free-flowing or differently regulated river(s). Temporal comparisons consider (4) pre- versus post-dam, or (5) sequential post-dam conditions. However, spatial comparisons are complicated by the fact that dams are not randomly located, and temporal comparisons are commonly limited by sparse historic information. As a result, comparative approaches are often correlative and vulnerable to confounding factors. To complement these analyses, (6) flow or sediment modifications can be implemented to test causal associations. Finally, (7) process-based modeling represents a predictive approach incorporating hydrogeomorphic processes and their biological consequences. In a case study of Hells Canyon, the upstream versus downstream comparison is confounded by a dramatic geomorphic transition. Comparison of the multiple reaches below the dams should be useful, and the comparison of Snake River with the adjacent free-flowing Salmon River may provide the strongest spatial comparison. A pre- versus post-dam comparison would provide the most direct study approach, but pre-dam information is limited to historic reports and archival photographs. We conclude that multiple study approaches are essential to provide confident interpretations of ecological impacts downstream from dams, and propose a comprehensive study for Hells Canyon that integrates multiple research strategies.