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A Comparison of Radioisotope Methods for River Flow Measurement; Comparaison de methodes radioisotopiques de mesure du debit des cours d'eau; Sravnenie radioizotopnykh metodov izmereniya rechnykh stokov; Comparacion de los metodos radioisotopicos para medir el caudal de los rios

Conference:

Abstract

The Dilution, Continuous Sample and Total Count Methods have been used in a comparative study of radiotracer methods of river flow measurement in the Aylburton Brook in Gloucestershire and the Usway Burn and Alwin Rivers in Northumberland . These are three rivers of differing geological character with flow rates varying between 2. 5 1/s and 3 m{sup 3}/s. In all tracer methods of flow measurement the distance between the measuring point and the point at which the tracer is introduced should be great enough for complete lateral mixing to have occurred. On the other hand, it should not be so great til at longitudinal dispersion is excessive or that tracer is lost by adsorption on the river bed. Dispersion depends on the hydraulic characteristics of the stream and is intrinsic to the method Adsorption depends on the choice of tracer and on the geological nature of the river bed. From this latter point of view H{sup 3} is ideal as it is not adsorbed; but it is difficult to measure, and its progress in die river cannot be followed directly. Other tracers are more convenient but they may be adsorbed. The degree of adsorption of Na{sup 24}, Br{sup 82} and  More>>
Authors:
Clayton, C. G.; Smith, D. B. [1] 
  1. Wantage Research Laboratory Atomic Energy Research Establishment Wantage, Berks (United Kingdom)
Publication Date:
Aug 15, 1963
Product Type:
Conference
Resource Relation:
Conference: Symposium on the Application of Radioisotopes in Hydrology, Tokyo (Japan), 5-9 Mar 1963; Other Information: 5 figs., 6 tabs., 11 refs.; Related Information: In: Radioisotopes in Hydrology. Proceedings of a Symposium| 478 p.
Subject:
58 GEOSCIENCES; ADSORPTION; BROMINE 82; CHEMISORPTION; COMPARATIVE EVALUATIONS; FLOW RATE; HYDROLOGY; PHOSPHORUS 32; SODIUM 24; STREAMS; TRACER TECHNIQUES; TRITIUM OXIDES
OSTI ID:
22095809
Research Organizations:
International Atomic Energy Agency, Vienna (Austria)
Country of Origin:
IAEA
Language:
English
Other Identifying Numbers:
Other: ISSN 0074-1884; TRN: XA13R0241053950
Submitting Site:
INIS
Size:
page(s) 1-24
Announcement Date:
May 17, 2013

Conference:

Citation Formats

Clayton, C. G., and Smith, D. B. A Comparison of Radioisotope Methods for River Flow Measurement; Comparaison de methodes radioisotopiques de mesure du debit des cours d'eau; Sravnenie radioizotopnykh metodov izmereniya rechnykh stokov; Comparacion de los metodos radioisotopicos para medir el caudal de los rios. IAEA: N. p., 1963. Web.
Clayton, C. G., & Smith, D. B. A Comparison of Radioisotope Methods for River Flow Measurement; Comparaison de methodes radioisotopiques de mesure du debit des cours d'eau; Sravnenie radioizotopnykh metodov izmereniya rechnykh stokov; Comparacion de los metodos radioisotopicos para medir el caudal de los rios. IAEA.
Clayton, C. G., and Smith, D. B. 1963. "A Comparison of Radioisotope Methods for River Flow Measurement; Comparaison de methodes radioisotopiques de mesure du debit des cours d'eau; Sravnenie radioizotopnykh metodov izmereniya rechnykh stokov; Comparacion de los metodos radioisotopicos para medir el caudal de los rios." IAEA.
@misc{etde_22095809,
title = {A Comparison of Radioisotope Methods for River Flow Measurement; Comparaison de methodes radioisotopiques de mesure du debit des cours d'eau; Sravnenie radioizotopnykh metodov izmereniya rechnykh stokov; Comparacion de los metodos radioisotopicos para medir el caudal de los rios}
author = {Clayton, C. G., and Smith, D. B.}
abstractNote = {The Dilution, Continuous Sample and Total Count Methods have been used in a comparative study of radiotracer methods of river flow measurement in the Aylburton Brook in Gloucestershire and the Usway Burn and Alwin Rivers in Northumberland . These are three rivers of differing geological character with flow rates varying between 2. 5 1/s and 3 m{sup 3}/s. In all tracer methods of flow measurement the distance between the measuring point and the point at which the tracer is introduced should be great enough for complete lateral mixing to have occurred. On the other hand, it should not be so great til at longitudinal dispersion is excessive or that tracer is lost by adsorption on the river bed. Dispersion depends on the hydraulic characteristics of the stream and is intrinsic to the method Adsorption depends on the choice of tracer and on the geological nature of the river bed. From this latter point of view H{sup 3} is ideal as it is not adsorbed; but it is difficult to measure, and its progress in die river cannot be followed directly. Other tracers are more convenient but they may be adsorbed. The degree of adsorption of Na{sup 24}, Br{sup 82} and P{sup 32} in the form of NaHC0{sub 3}, NH{sub 4}Br and NaH{sub 2} P0{sub 4} has been studied by comparison of measurements at several points downstream of a common injection point and by introduction of tritiated water (HTO) simultaneously with each of the three tracers. It has been shown that P{sup 32}, which was expected to undergo a high degree of chemisorption, is valueless as a tracer for river flow measurement when used without carrier although there is a significant decrease in error when it is used with carrier. Na{sup 24} and Br{sup 82} show no evidence of adsorption at distances much greater than that required to give lateral mixing although at a distance of over 660 m in the slowest-moving river there is some evidence of Na{sup 24} removal. Some observations of the degree of lateral and longitudinal dispersion which affect the general application of tracer techniques to river flow measurement will be presented. It is concluded that all three methods can be satisfactorily used. The Continuous Sample Method is ultimately preferred as it gives the highest accuracy for the smallest quantity of tracer. [French] Aux fins d'une etude comparative des methodes radioisotopiques de mesure de debit fluvial, on a employe les methodes de dilution, d'echantillonnage continu et de comptage total sur l'Aylburton (Gloucestershire), l'Usway et l'Alwin (Northumberland). Ces trois cours d'eau presentent des particularites geologiques differentes et leur debit varie entre 2,5 1 et 3 m{sup 3}/s. Dans toutes les methodes de mesure de debit faisant appel a l'emploi d'indicateurs, il est souhaitable que la distance entre le point ou la mesure est effectuee et celui ou l'indicateur est introduit soit suffisamment grande pour permettre un brassage lateral complet. D'autre part, cette distance doit etre suffisamment reduite pour que la dispersion longitudinale ne soir pas excessive ou que l'indicateur ne se perde pas par adsorption sur le lit. Le mecanisme de dispersion est lie aux caracteristiques hydrologiques du cours d'eau et a la methode utilisee. L'adsorption est fonction du choix de l'indicateur et de la nature geologique du lit de la riviere. Le tritium est ideal a cet egard car il n'est pas adsorbe, mais il est difficile a mesurer et on ne peut pas suivre directement son mouvement dans la riviere. D'autres indicateurs conviennent mieux, mais ils peuvent etre adsorbes. On a etudie le degre d'adsorption de {sup 24}Na, {sup 82}Br et {sup 32}P sous forme de NaHCO{sub 3}, NH{sub 4}Br et NaH{sub 2}P0{sub 4}, en comparant les mesures faites en plusieurs points situes en aval d'un point unique d'injection et en introduisant de l'eau tritiee (HTO) en meme temps que chacun des trois indicateurs. Il s'est revele que {sup 32}P est sujet a une forte chimiosorption, comme on le supposait, et n'est par consequent d'aucune utilite comme indicateur dans la mesure du debit d'un cours d'eau s'il n'est pas employe avec un entraineur; mais avec un entraineur, on observe une amelioration marquee de l'exactitude des resultats. {sup 24}Na et {sup 82}Br n'ont accuse aucune adsorption a des distances bien superieures a celles qui sont necessaires pour assurer une brassage lateral; dans la riviere la plus lente, toutefois, on a note, a plus de 660 m du point d'injection, une certaine diminution de {sup 24}Na. Le memoire contient quelques observations sur la dispersion laterale et longitudinale qui, a une certain degre, influe sur l'application generale des methodes radioisotopiques a la mesure du debit des cours d'eau. Les auteurs parviennent a la conclusion que les trois methodes donnent des resultats satisfaisants. Ils preferent, en fin'de compte, la methode d'echantillonnage continue, car elle donne les resultats les plus exacts pour, la quantite minimum d'indicateur. (author) [Spanish] Los autores han empleado los procedimientos de dilucion, muestreo continuo y recuento total en un estudio comparativo de los metodos radioisotopicos de medicion de caudales fluviales en el arroyo Aylburton, en Gloucestershire, y en los rios Usway Burn y Alwin, en Northumberland. Se trata de tres tios de caracteristicas geologicas diferentes, cuyos caudales oscilan entre 2,5 1/s y 3 m{sup 3}/s. En todos los metodos de medicion de caudales que emplean indicadores, la distancia entre el punto en que se efectua la medicion y el punto en que se anade el indicador tiene que ser suficientemente grande para que se produzca una mezcla lateral completa. Por otra parte, no debe ser excesiva para evitar que la dipersion longitudinal supere cierto valor o que se pierda parte del indicador por adsorcion en el lecho fluvial. La dispersion depende de las caracteristicas hidraulicad de la corriente y es inherente al metodo. Por su parte, la adsorcion depende del indicador elegido y de las caracteristicas geologicas del lecho del rio. Desde este punto de vista, el tritio posee excelentes propiedades, puesto que no es absorbido, pero es dificil de medir y no es posible seguir directamente su desplazamiento en el rio. Otros indicadores resultan mas convenientes, pero pueden sufrir adsorcion. Los autores han estudiado los grados de adsorcion del {sup 24}Na, {sup 82}Br y {sup 32}P en forma de NaHC0{sub 3}, NH{sub 4}Br y NaH{sub 2}PO{sub 3} respectivamente, que introdujeron en un mismo punto del rio junto con agua tritiada (HTO), para comparar despues las mediciones realizadas en varios lugares situados aguas abajo. Se ha visto que el EP, para el que se esperaban grandes perdidas por quimisorcion, no sirve para medir el caudal de rios cuando se emplea sin portador, aunque el error disminuye notablemente cuando se trabaj a con portador. En el caso del {sup 24}Na y del {sup 32}Br, no se observa adsorcion a distancias mucho mayores que la requerida para que la mezcla lateral sea satisfactoria si bien a una distancia de 660 m en el rio de corriente mas lenta se observo que parte del {sup 24}Na habia desaparecido. Los autores formulan algunas observaciones sobre el grado de dispersion lateral y longitudinal que tienen importancia para la aplicacion de tecnicas radioisotopicas en general a la medicion del caudal de rios. Llegan a la conclusion de que los tres metodos pueden dar resultados satisfactorios. En definitiva, los autores dan preferencia al metodo de muestreo continuo, ya que permite alcanzar una mayor precision para un consumo minimo de indicador. (author) [Russian] Metody razbavleniya, nepreryvnogo otbora prob i polnogo scheta primenyayutsya pri sravnitel'nom izuchenii radioindikatornykh metodov izmereniya stokov v rekakh Ajbehrton Bruk v Gluchestershire i Usvej Bern i Alvin Rivers - v Nortamberlehnde. EHto - tri reki s razlichnymi geologicheskimi kharakteristikami i skorostyami stokov, izmenyayushchikhsya v diagyuzone ot 2,5 l/sek do 3 m{sup 3}/sek. Pri ispol'zovanii lyubykh indikatornykh metodov izmereniya stoka rasstoyanie mezhdu tochkoj izmereniya i tochkoj vvedeniya indikatora dolzhno byt' dostatochno bol'shim, poskol'ku dolzhno proizojti polnoe smeshivanie. V to zhe vremya ehto rasstoyanie ne dolzhno byt' slishkom bol'shim, chtoby izbezhat' znachitel'noj prodol'noj dispersii ili poteri indikatora v rezul'tate pogloshcheniya ego dnom reki. Dispersiya zavisit ot gidravlicheskikh kharakteristik stoka, i ona kharakterna dlya ehtogo metoda. Pogloshchenie zavisit ot vybora indikatora i ot geologicheskoj prirody dna reki. Imenno s ehtoj tochki zreniya N{sup 3} yavlyaetsya ideal'nym indikatorom, poskol'ku on ne pogloshchaetsya. Odnako ego trudno izmeryat', i ego prokhozhdenie v reke ne mozhet byt' proslezheno neposredstvenno. Drugie indikatory bolee udobny, no oni mogut pogloshchat'sya. Stepen' pogloshcheniya Na{sup 24},Br{sup 82} i R{sup 32} v vide NaHC0{sub 3}, NH{sub 4}Br i NaN{sub 2}R0{sub 4} izuchalas' putem sravneniya dannykh izmerenij v neskol'kikh tochkakh vniz po techeniyu o obshchej tochki vvedeniya i putem vvedeniya mechennoj tritiem vody (NTO) odnovremenno s vvedeniem kazhdogo iz trekh indikatorov. Ustanovleno, chto R{sup 32}, kotoryj, kak ozhidalos', budet sil'no pogloshchat'sya khimicheski, yavlyaetsya na samom dele neprigodnym v kachestve indikatora bez nositelya dlya izmereniya rechnykh stokov, khotya s nositelem oshibka izmerenij znachitel'no men'she. Na{sup 24} i Br{sup 82} ne proyavlyayut priznakov pogloshcheniya ikh na znachitel'nykh rasstoyaniyakh, bol'she chem neobkhodimo dlya gorizontal'nogo smeshivaniya; na rasstoyanii svyshe 660 m v reke s samym medlennym techeniem obnaruzhivayutsya priznaki ischeznoveniya Na{sup 24}. Predstavleny nekotorye nablyudeniya otnositel'no stepeni gorizontal'noj i prodol'noj dispersii, kotoraya otrazhaetsya na obshchem primenenii indikatornykh metodov dlya izmerenij rechnykh stokov. Delaetsya vyvod, chto vse tri metoda mogut uspeshno primenyat'sya. Odnako metod nepreryvnogo otbora prob v konechnom schete bolee predpochtitelen, poskol'ku on daet bolee vysokuyu tochnost' pri minimal'nom kolichestve indikatora. (author)}
place = {IAEA}
year = {1963}
month = {Aug}
}