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首页> 外文会议>Uttaradit Rajabhat University International Conference on Science and Technology >Estimation of Evaporative Loss of Surface Water Using Stable Isotopes in a Lowland Rice Field, Suphanburi, Thailand
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Estimation of Evaporative Loss of Surface Water Using Stable Isotopes in a Lowland Rice Field, Suphanburi, Thailand

机译：利用稳定同位素在低地稻田，泰国苏武里，泰国近同位素蒸发损失估计

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摘要

Water scarcity resulting from erratic rainfall pattern is a major problem over the world. As diminishing water resources for agriculture and increasing demand for rice yield, understanding on hydrological cycle is crucial on water management. The loss of water due to evaporation from rivers and canals constitutes a substantial part of useable water. The estimated evaporation loss can be obtained by using the isotope compositions of precipitation and an established local evaporation line. It is recognized a very useful tool in providing a quick and cost effective insight into the water balance of surface water pool. In this study of 2015-2017 in Suphanburi province, the isotopic signatures of precipitation and surface water canal resulted in a local meteoric water line of δ~2H = 7.63 δ~(18)O - 1.05 (n = 168, r~2 = 0.94) and local evaporation line for surface water creek of δ~2H = 5.95 δ~(18)O - 14.42 (n = 155, r~2 = 0.90), respectively. The estimated evaporation loss using the Hydrocalculator software indicated that the estimated fractional water loss by evaporation in the surface water canal of Sri Prachan district, Suphanburi was ～12%.
机译：不稳定的降雨模式产生的水资源稀缺是世界上的一个主要问题。作为农业水资源递减和日益增长的水稻产量需求，对水文循环的了解对水管理至关重要。由于河流和运河的蒸发而导致的水损失构成了可用水的大部分。通过使用沉淀的同位素组合物和已建立的局部蒸发线可以获得估计的蒸发损失。它被认识到提供了一种非常有用的工具，在提供了对地表水池的水平的快速和成本效益的洞察力。在本研究2015-2017在苏武里省的沉淀和表面水管中的同位素特征导致δ〜2h =7.63δ〜（18）o - 1.05（n = 168，R〜2 = 0.94）和局部水溪的局部蒸发线分别为δ〜2h =5.95δ〜（18）O-14.42（n = 155，R〜2 = 0.90）。使用水环化器软件的估计蒸发损失表明，Suphanburi斯里·普拉肯区地表水渠蒸发估计的分数水分〜12％。

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