CAJ | 학술논문

土壤是一个复杂的系统,研究土壤对输入水分中氢氧稳定同位素组成的影响对了解水分在土壤中的运移机理及流域径流分割等具有重要作用.通过两种不同土壤与同一种输入水之间和同一种土壤与两种不同输入水之间的两组混合实验,研究土壤水与输入水达到同位素平衡的时间和引起二者同化素变化的原因.实验结果表明,土壤水与输入水之间同位素变化主要由混合作用引起;土壤对输入水氢氧同位素的吸附现象较难观测到,易被氢氧同位素测样误差掩盖.有待进一步研究;土壤水和输入水在混合搅拌条件下最快能在0.5～1h达到同位素平衡.
토양시일개복잡적계통,연구토양대수입수분중경양은정동위소조성적영향대료해수분재토양중적운이궤리급류역경류분할등구유중요작용.통과량충불동토양여동일충수입수지간화동일충토양여량충불동수입수지간적량조혼합실험,연구토양수여수입수체도동위소평형적시간화인기이자동화소변화적원인.실험결과표명,토양수여수입수지간동위소변화주요유혼합작용인기;토양대수입수경양동위소적흡부현상교난관측도,역피경양동위소측양오차엄개.유대진일보연구;토양수화수입수재혼합교반조건하최쾌능재0.5～1h체도동위소평형.
Soil is a complex system. It is important to study isotopic variations in input water in soil system for water movement mechanism and hydrograph separation. Mechanisms causing isotopic variations and time for reaching isotopic balance between different soil water and input water are studied through soil water mixing experiments. Experimental results show that isotopic variations in mixing water are mainly caused by isotopic mixing between soil water and input water. It is rather difficult to observe the phenomenon of soil adsorbing isotopes of input water due to measurement errors of hydrogen and oxygen isotopes. The isotopes of soil water and input water reach balance between 0. 5 and 1 hour after the beginning of soil water mixing experiments.