12/11/2023 0 Comments Compositions of water![]() Ichiyanagi K, Tanoue M (2016) Spatial analysis of annual mean stable isotopes in precipitation across Japan based on an intensive observation period throughout 2013. ![]() Granger RJ, Hedstrom N (2011) Modelling hourly rates of evaporation from small lakes. ![]() Gibson JJ, Prepas EE, McEachern P (2002) Quantitative comparison of lake throughflow, residency, and catchment runoff using stable isotopes: modelling and results from a regional survey of Boreal lakes. International Atomic Energy Agency, Vienna, Technical reports series, No. Gat JR, Gonfiantini R (1981) Stable isotope hydrology: deuterium and oxygen-18 in the water cycle. Water Resour Res 51(2):1284–1299ĭogramaci S, Firmani G, Hedley P, Skrzypek G, Grierson P (2015) Evaluating recharge to an ephemeral dryland stream using a hydraulic model and water, chloride and isotope mass balance. Tellus 16:436–468ĭelavau C, Chun KP, Stadnyk T, Birks SJ, Welker JM (2015) North American precipitation isotope ( δ 18O) zones revealed in time series modeling across Canada and northern United States. J Hydrol 147:169–195ĭansgaard W (1964) Stable isotopes in precipitation. Limnol Oceanogr 59(6):2150–2165īrown CE (1993) Use of principal-component, correlation, and stepwise multiple-regression analyses to investigate selected physical and hydraulic properties of carbonate-rock aquifers. These two elements influence the isotopic compositions of irrigation-pond waters across Japan, resulting in different values from spring waters.īrooks JR, Gibson JJ, Birks SJ, Weber MH, Rodecap KD, Stoddard JL (2014) Stable isotope estimates of evaporation: inflow and water residence time for lakes across the United States as a tool for national lake water quality assessments. In addition to the regional differences of this seasonal isotopic variation, irrigation-pond waters were affected by evaporative isotopic enrichment. The isotopic compositions of irrigation-pond waters with relatively short residence times show seasonal variations, reflecting seasonal differences in isotopic compositions of precipitation, whereas spring waters show temporally invariant isotopic compositions. The isotopic compositions of irrigation-pond waters are affected by meteorological factors (air temperature, ratio of winter precipitation to annual precipitation and wind speed) and geometrical feature (water depth). In particular, the ratio of winter precipitation characterizes the spatial variations of the isotopic compositions on different ocean sides of the archipelago. ![]() The isotopic compositions of spring waters are mainly affected by geographical factors (latitude and altitude) and meteorological factors (annual precipitation and ratio of winter precipitation to annual precipitation). The national-scale variations and regional characteristics of the stable isotopic compositions of irrigation ponds, which are small reservoirs for irrigating paddy rice fields and play an important role in supporting rice production in Japan, and spring waters were investigated during irrigation periods for paddy rice. ![]()
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