全文获取类型
收费全文 | 85篇 |
免费 | 10篇 |
国内免费 | 1篇 |
专业分类
安全科学 | 3篇 |
废物处理 | 2篇 |
环保管理 | 40篇 |
综合类 | 13篇 |
基础理论 | 9篇 |
环境理论 | 1篇 |
污染及防治 | 19篇 |
评价与监测 | 4篇 |
社会与环境 | 5篇 |
出版年
2022年 | 3篇 |
2021年 | 3篇 |
2020年 | 1篇 |
2019年 | 1篇 |
2018年 | 1篇 |
2017年 | 4篇 |
2016年 | 4篇 |
2015年 | 5篇 |
2014年 | 3篇 |
2013年 | 11篇 |
2012年 | 2篇 |
2011年 | 2篇 |
2010年 | 5篇 |
2009年 | 7篇 |
2008年 | 3篇 |
2007年 | 5篇 |
2006年 | 3篇 |
2005年 | 2篇 |
2004年 | 1篇 |
2003年 | 3篇 |
2002年 | 3篇 |
2001年 | 1篇 |
2000年 | 2篇 |
1999年 | 2篇 |
1998年 | 4篇 |
1997年 | 2篇 |
1996年 | 1篇 |
1994年 | 2篇 |
1993年 | 2篇 |
1991年 | 1篇 |
1989年 | 2篇 |
1988年 | 1篇 |
1986年 | 1篇 |
1983年 | 1篇 |
1981年 | 2篇 |
排序方式: 共有96条查询结果,搜索用时 140 毫秒
31.
Ronald Parker J.G. Arnold Michael Barrett Lawrence Burns Lee Carrubba S.L. Neitsch N.J. Snyder R. Srinivasan 《Journal of the American Water Resources Association》2007,43(6):1424-1443
Abstract: The U.S. Environmental Protection Agency (USEPA) Office of Pesticide Programs (OPP) has completed an evaluation of three watershed‐scale simulation models for potential use in Food Quality Protection Act pesticide drinking water exposure assessments. The evaluation may also guide OPP in identifying computer simulation tools that can be used in performing aquatic ecological exposure assessments. Models selected for evaluation were the Soil Water Assessment Tool (SWAT), the Nonpoint Source Model (NPSM), a modified version of the Hydrologic Simulation Program‐Fortran (HSPF), and the Pesticide Root Zone Model‐Riverine Water Quality (PRZM‐RIVWQ) model. Simulated concentrations of the pesticides atrazine, metolachlor, and trifluralin in surface water were compared with field data monitored in the Sugar Creek watershed of Indiana’s White River basin by the National Water Quality Assessment (NAWQA) program. The evaluation not only provided USEPA with experience in using watershed models for estimating pesticide concentration in flowing water but also led to the development of improved statistical techniques for assessing model accuracy. Further, it demonstrated the difficulty of representing spatially and temporally variable soil, weather, and pesticide applications with relatively infrequent, spatially fixed, point estimates. It also demonstrated the value of using monitoring and modeling as mutually supporting tools and pointed to the need to design monitoring programs that support modeling. 相似文献
32.
Sabu Paul Raghavan Srinivasan Joaquin Sanabria Patricia K. Haan Saqib Mukhtar Kerry Neimann 《Journal of the American Water Resources Association》2006,42(4):1017-1031
ABSTRACT: Under the Clean Water Act (CWA) program, the Texas Commission on Environmental Quality (TCEQ) listed 110 stream segments in the year 2000 with pathogenic bacteria impairment. A study was conducted to evaluate the probable sources of pollution and characterize the watersheds associated with these impaired water bodies. The primary aim of the study was to group the water bodies into clusters having similar watershed characteristics and to examine the possibility of studying them as a group by choosing models for total maximum daily load (TMDL) development based on their characteristics. This approach will help to identify possible sources and determine appropriate models and hence reduce the number of required TMDL studies. This in turn will help in reducing the effort required to restore the health of the impaired water bodies in Texas. The main characteristics considered for the classification of water bodies were land use distribution within the watershed, density of stream network, average distance of land of a particular use to the closest stream, household population, density of on‐site sewage facilities (OSSFs), bacterial loading from different types of farm animals and wildlife, and average climatic conditions. The climatic data and observed instream fecal coliform bacteria concentrations were analyzed to evaluate seasonal variability of instream water quality. The grouping of water bodies was carried out using the multivariate statistical techniques of factor analysis/principal component analysis, cluster analysis, and discriminant analysis. The multivariate statistical analysis resulted in six clusters of water bodies. The main factors that differentiated the clusters were found to be bacterial contribution from farm animals and wildlife, density of OSSFs, density of households connected to public sewers, and land use distribution. 相似文献
33.
K Srinivasan R Radhakrishnamurty 《Journal of environmental science and health. Part. B》1989,24(1):87-95
Rats fed with dietary beta- and gamma-isomers of hexachlorocyclohexane excreted higher amounts of phenolics and glucuronides in the urine as compared to controls. The excretion profile of urinary phenolics and glucuronides suggested a relatively higher turnover rate of the gamma-isomer in the body as compared to the beta-isomer. Excretion of ethereal sulfate was low in hexachlorocyclohexane fed animals. 相似文献
34.
35.
36.
S. V. R. K. Prabhakar Ancha Srinivasan Rajib Shaw 《Mitigation and Adaptation Strategies for Global Change》2009,14(1):7-33
The field of climate change is full of uncertainties that are limiting strategic disaster risk reduction planning. In this
paper, however, we argued that there is lot to do before we get our hands on reliable estimates of future climate change impacts.
It includes bringing together different stakeholders in a framework suggested in this paper, developing case studies that
reflect long-term local impacts of climate change, capacity building of local stakeholders that enables them to take decisions
under uncertainty etc. We proposed a simple scheme that brings together climate, disaster and policy community together to
start a dialogue in a run-up to understanding wider aspects of long-term risk reduction at local level. Strategic thinking,
which has only been restricted to national and regional planning to date, needs to be inculcated in local level disaster risk
reduction and policy personnel as well. There is a need to move from the attitude of considering local level players as ‘implementers’
to ‘innovators’ for which developing a network of self learning and evolving organizations are required at the local level. 相似文献
37.
Treatment of taste and odor causing compounds 2-methyl isoborneol and
geosmin in drinking water: A critical review 总被引:2,自引:0,他引:2
Problems due to the taste and odor in drinking water are common in treatment facilities around the world. Taste and odor are
perceived by the public as the primary indicators of the safely and acceptability of drinking water and are mainly caused by the
presence of two semi-volatile compounds – 2-methyl isoborneol (MIB) and geosmin. A review of these two taste and odor causing
compounds in drinking water is presented. The sources for the formation of these compounds in water are discussed alongwith the
health and regulatory implications. The recent developments in the analysis of MIB/geosmin in water which have allowed for rapid
measurements in the nanogram per liter concentrations are also discussed. This review focuses on the relevant treatment alternatives,
that are described in detail with emphasis on their respective advantages and problems associated with their implementation in a fullscale
facility. Conventional treatment processes in water treatment plants, such as coagulation, sedimentation and chlorination have
been found to be ine ective for removal of MIB/geosmin. Studies have shown powdered activated carbon, ozonation and biofiltration
to be e ective in treatment of these two compounds. Although some of these technologies are more e ective and show more promise
than the others, much work remains to be done to optimize these technologies so that they can be retrofitted or installed with minimal
impact on the overall operation and e ectiveness of the treatment system. 相似文献
38.
Vaithiyasubramanian Raguraman Srinivasan Deepasree Kanagarajan Arul Kumar 《Environmental science and pollution research international》2022,29(48):72528-72544
Environmental Science and Pollution Research - The demand for scarce raw material has been increased with rise of construction. An ideal raw material is clay, which is abundantly used in... 相似文献
39.
K. Devi M. C. Raicy Deshraj Trivedi P. Srinivasan S. G. N. Murthy Ronald J. Goble Rajesh R. Nair 《Journal of Coastal Conservation》2013,17(4):729-742
The East coast of India is subject to continuous changes by high energy events. We sought to assess the depositional conditions along the coast from the geophysical and sedimentological character of the dune sands of the Gopalpur and Paradeep coast of Odisha, and the Sagarnagar coast of North Visakhapatnam. Quartz layers of the heavy mineral-rich zone collected at a depth of ~2 m from the landward foot of the dunes in the Visakhapatnam and Odisha coast, gave the OSL age estimates as 1,050?±?50 and 260?±?10 years respectively, revealing that the age of the dunes in Visakhapatnam are older than those on the Odisha coast. Episodic high energy events have affected the coast. Evidence from ground penetrating radar data consists of three stratigraphic units. The upper unit consists of vague reflections, parallel to the ground in continuous manner, most probably formed by wind action. On the other hand, the middle layer shows high amplitude reflections of heavy mineral-rich massive layers, possibly the result of tsunami activity. The lower massive layer parallel to the ground surface shows a low reflection pattern. The GPR studies showed that the thickness of the heavy mineral layers is greater on the landward foot of the dune as compared to that on the seaward side. According to the grain size analysis, the dune is composed of both wind generated and tsunamigenic sediments. The scanning electron microscope studies revealed that the heavy minerals present in the dunes are mainly sillimanite, ilmenite, garnet, pyroxene, rutile, sphene, biotite, hornblende, zircon, monazite and magnetite. The study demonstrates the origin of sand dunes in different ages along the East Coast of India by the effect of various natural phenomena. 相似文献
40.
Olivier Ubrich Balasubrahmanyan Srinivasan Pablo Lerena Dominique Bonvin Francis Stoessel 《Journal of Loss Prevention in the Process Industries》1999,12(6):814-493
Maximising the yield of the second order reaction (2-butanol+propionic anhydride) by manipulating the inlet flow rate is considered for an isothermal semi-batch process. First a procedure for the determination of the kinetic parameters using coupled spectroscopic and calorimetric methods is presented. Then an optimisation of the reaction system is performed numerically and verified experimentally. Constraints on the amount of heat produced and on the temperature attainable in the case of cooling failure are imposed for safety consideration. 相似文献