Techniques of Water-Resources Investigations of the United States Geological Survey
نویسندگان
چکیده
____________________________________ Part I, Sampling__ ____________ _____________ Sample preservation _,____.___ ___.___.__._ References__________-._______,-_-___--_-Carbon, all forms. ____-________---____.____ References..-,. __._ _________________ Chlorophylls.__-__ __._„____,_____._____ Extractive spectrophotometric method. __ References. ______..„__________________ Color. ___---_-_._____. __---__-_-_-__-__. Comparison method _ _ _ _ _ ______ ______ Extractable organic matter. _.-_._-__-____„_ Oils and waxes. ______ _________________ References _, _ _ _ _ _ _ _ _.„_„____ _ .. _ Methylene blue active substances___________ Synthetic anionic detergents ____________ Nitrogen, ammonia. __________ ____________ Distillation method. __________________ References. _ . ______________________ Nitrogen, nitrate, _______ __-___.___,___.,Brucine method. ________ _ _ __________ Reduction method. _ _ _ ________________ Page III 1 1
منابع مشابه
Sediment Transport Measurements
s and Program, Geological Society of America, Denver,Colo., 28(7,) A-261.Turcios, L. M., and Gray, J. R. (2001). „U.S. Geological Surveysediment and ancillary data on the World Wide Web.‰ Proceedings of the 7th Federal Interagency Sedimentation Conference, Subcommittee on Sedimentation, Reno, Nev.,Poster 31-36.Turcios, L. M., Gray, J. R., and Ledford, A. L. (2000). „...
متن کاملTechniques of Water-Resources Investigations OF the United States Geological Survey
Accurate measurement of water levels deeper than 1,000 feet in wells requires specialized equipment. Corrections for stretch and thermal expansion of measuring tapes must be considered, and other measuring devices must be calibrated periodically. Borehole deviation corrections also must be made. Devices for recording fluctuation of fluid level usually require mechanical modification for use at ...
متن کاملStatus and distribution of mangrove forests of the world using earth observation satellite datageb_584
ARSC Research and Technology Solutions, contractor to US Geological Survey (USGS) Earth Resources Observation and Science Center (EROS), Sioux Falls, SD 57198, USA, United Nations Environment Programme, United Nations Avenue, Gigiri, PO Box 30552, 00100, Nairobi, Kenya, US Geological Survey, Earth Resources Observation and Science Center (EROS), Sioux Falls, SD 57198, USA, US Geological Survey,...
متن کاملAncient Gold Mining Activities in India - An Overview
Gold was obtained through washing or panning of the river sands during initial periods of civilisation. With the advent of knowledge of metallurgical processing of ores it was recovered through mining of in-situ quartz reefs, and then from auriferous sulphide ores. The metal mining activities are evidenced in the form of large number of ‘ancient metal mines’ or ‘old workings’ and ‘placer mining...
متن کاملRace, Education Attainment, and Happiness in the United States
Background and aims: As suggests by the Minorities’ Diminished Returns (MDR) theory, educationattainment and other socioeconomic status (SES) indicators have a smaller impact on the health andwell-being of non-White than White Americans. To test whether MDR also applies to happiness, in thepresent study, Blacks and Whites were compared in terms of the effect of education attai...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2001