Long-term effects of evapotranspiration on the flow duration curve in a coniferous plantation forest over 40 years

IF 0.6 Q4 WATER RESOURCES

Hydrological Research Letters Pub Date : 2020-01-01 DOI:10.3178/hrl.14.1

K. Tsuruta, Y. Kosugi, M. Katsuyama, K. Kosugi, Masakazu Suzuki, M. Tani

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引用次数: 5

Abstract

: We quantified long-term trends in evapotranspiration, runoff, and deep percolation using 40 years of hydrological data, examining the effects of evapotranspiration on runoff during forest development in a coniferous species. Using the flow duration curve, we evaluated the effects of evapo‐ transpiration on the entire range of flow stages (high to low flows). During the 40-year forest development, deep perco‐ lation ranged from 97 mm to 105 mm. Annual evapotran‐ spiration increased by 623–766 mm, which appeared to be caused by increased air temperature as well as forest devel‐ opment. Annual runoff consequently decreased by 937– 777 mm. In particular, pronounced decreases in daily flow were found with an exceedance probability of >11% in the flow duration curve. Long-term effects of evapotranspira‐ tion on runoff during forest development continued for a longer period than predicted by previous catchment studies of ~20 years duration. Our results suggest that the long-term patterns of evapotranspiration and runoff during forest development would differ from those reported by previous catchment studies under climate warming conditions and highlight the need for further research into separating the effects of forest development and increasing air tempera‐ ture on evapotranspiration in long-term hydrological data.

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40年针叶林蒸散对流量持续曲线的长期影响

我们利用40年的水文数据量化了蒸散发、径流和深渗的长期趋势，研究了针叶林物种在森林发展过程中蒸散发对径流的影响。利用流动持续时间曲线，我们评估了蒸散发对整个流动阶段(高流量到低流量)的影响。在40年的森林发展过程中，深度透化在97 ~ 105 mm之间。年蒸散量增加623 ~ 766 mm，这可能是由于气温升高和森林发育所致。年径流量因此减少了937 - 777毫米。特别是，在流量持续时间曲线上，发现日流量明显减少，超出概率为bbbb11 %。在森林发展过程中，蒸散对径流的长期影响持续的时间比以前的流域研究预测的持续时间更长，持续时间约为20年。我们的研究结果表明，在气候变暖条件下，森林发展过程中蒸散发和径流的长期模式可能与以前的流域研究报告不同，并强调需要进一步研究森林发展和气温升高对长期水文数据中蒸散发的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Hydrological Research Letters WATER RESOURCES-

CiteScore

1.90

自引率

18.20%

发文量

审稿时长

10 weeks

期刊介绍： Hydrological Research Letters (HRL) is an international and trans-disciplinary electronic online journal published jointly by Japan Society of Hydrology and Water Resources (JSHWR), Japanese Association of Groundwater Hydrology (JAGH), Japanese Association of Hydrological Sciences (JAHS), and Japanese Society of Physical Hydrology (JSPH), aiming at rapid exchange and outgoing of information in these fields. The purpose is to disseminate original research findings and develop debates on a wide range of investigations on hydrology and water resources to researchers, students and the public. It also publishes reviews of various fields on hydrology and water resources and other information of interest to scientists to encourage communication and utilization of the published results. The editors welcome contributions from authors throughout the world. The decision on acceptance of a submitted manuscript is made by the journal editors on the basis of suitability of subject matter to the scope of the journal, originality of the contribution, potential impacts on societies and scientific merit. Manuscripts submitted to HRL may cover all aspects of hydrology and water resources, including research on physical and biological sciences, engineering, and social and political sciences from the aspects of hydrology and water resources.