Faculty Profiles - TSUJIMOTO Kumiko

Papers - TSUJIMOTO Kumiko

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Investigation of the estimation of soil moisture at the Cambodia Pursat station by using LDAS-UT Reviewed

Katsunori Tamagawa, Rasmy Mohamed, Toshio Koike, Kumiko Tsujimoto, Kentaro Aida, Hideyuki Fujii, Takao Masumoto

The Journal of Japan Society of Civil Engineers 71 ( 4 ) I_409 - I_414 2015

Onset of the Asian Summer Monsoon and land-atmosphere interaction over the Indochina Peninsula Reviewed

Kumiko Tsujimoto, Toshio Koike

The Journal of Japan Society of Civil Engineers 70 ( 4 ) I_295 - I_300 2014

Validation of satellite precipitation products over Cambodia Reviewed

Kumiko Tsujimoto, Toshio Koike, Monichoth So Im, Kentaro Aida, Katsunori Tamagawa, Tomoyuki Nukui, Shin'ichi Sobue

Transactions of the Japan Society for Aeronautical and Space Sciences, Aerospace Technology Japan 12 ( ists29 ) Tn_41 - Tn_46 2014

Water and Food Security under Climate Change in Cambodia Reviewed

Monichoth So Im, Kumiko Tsujimoto, Kentaro Aida, Katsunori Tamagawa, Tetsu Ohta, Toshio Koike, Tomoyuki Nukui, Shin'ichi Sobue, Koki Homma

Transactions of the Japan Society for Aeronautical and Space Sciences, Aerospace Technology Japan 12 ( ists29 ) Tn_31 - Tn_39 2014

A trial impact assessment of rice production by climate change and irrigation at the granary of western Cambodia Reviewed

Tetsu Ohta, Kumiko Tsujimoto, Koki Homma, Toshio Koike, Monichoth So Im

The Journal of Japan Society of Civil Engineers 70 ( 4 ) I_265 - I_270 2014

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japan Society of Civil Engineers

Rice yields at the Sangker river basin in western Cambodia are simulated by a coupled model of the distributed hydrological model WEB-DHM and the rice growth model SIMRIW-rainfed. The results are validated by in-situ statistical data and FAOSTAT. Then, future rice yields are also simulated by using GCMs outputs. In addition, a simple irrigation model is introduced into the coupled model. By using this model, rice yields in consideration of climate change and irrigation are assessed.<br>In this study, effectiveness of irrigation in this river basin is shown for both of the present and future climates. The results showed that, by constructing irrigation facilities, a stable rice yield can be obtained even if no yield is obtained at rain-fed paddy fields. Also, this study showed that a variation of future rainfall pattern will affect a variation of rice yield.

DOI： 10.2208/jscejhe.70.I_265

CiNii Article

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Other Link： https://jlc.jst.go.jp/DN/JLC/20010509768?from=CiNii

Land-lake breezes at low latitudes: The case of Tonle Sap Lake in Cambodia Reviewed

Kumiko Tsujimoto, Toshio Koike

Journal of Geophysical Research Atmospheres 118 ( 13 ) 6970 - 6980 2013.7

Language：English Publishing type：Research paper (scientific journal) Publisher：Blackwell Publishing Ltd

Tonle Sap Lake is the largest freshwater lake in Southeast Asia. During the postmonsoon season, a small linear cloud system has been observed over this lake in early morning, while the sky above the surrounding land is clear. Although this cloud system is apparently generated by land breezes, previous studies on land-lake (sea) circulation have suggested that environmental factors at low latitudes inhibit development of nocturnal land breezes. In this study, we investigate the mechanism of these early morning clouds through numerical simulation. The simulations show a linear updraft system over the lake, forming along the southwest lakeshore around 22:00 and moving northeast to the middle of the lake. The heavier air mass from the land meets the extraordinarily warm and humid air mass over the lake, triggering updrafts under the conditionally convective instability. The characteristic high surface water temperature was favorable for generation of the land breeze and updraft systems. That high surface water temperature of the lake is produced by the tropical climate along with efficient energy absorption because of the shallowness of the water body. This unique feature can generate a clear nocturnal land breeze circulation accompanying a migrating updraft system over the lake despite its low latitude. Key Points Land-breeze develops even though this lake is located in the low-latitudes. A lined-up cloud is formed at night over the lake by the very hot lake water. The convection migrates over the lake by the katabatic wind. ©2013. American Geophysical Union. All Rights Reserved.

DOI： 10.1002/jgrd.50547

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Land-lake breezes at low latitudes: The case of Tonle Sap Lake in Cambodia Reviewed

Kumiko Tsujimoto, Toshio Koike

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 118 ( 13 ) 6970 - 6980 2013.7

Language：English Publishing type：Research paper (scientific journal) Publisher：AMER GEOPHYSICAL UNION

DOI： 10.1002/jgrd.50547

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Water and Food Security under Climate Change in Cambodia

Monichoth So Im, Kumiko Tsujimoto, Kentaro Aida, Katsunori Tamagawa, Tetsu Ohta, Toshio Koike, Tomoyuki Nukui, Shin'ichi Sobue, Koki Homma

proceedings of 29th International Symposium on Space Technology and Science 12 ( ists29 ) Tn_31 - Tn_39 2013

Development of Soil Moisture Algorithm Using ALOS/PALSAR in Paddy Field, Cambodia

Kentaro Aida, Toshio Koike, Monichoth So Im, Kumiko Tsujimoto, Katsunori Tamagawa, Tomoyuki Nukui, Shin'ichi Sobue, Shi, J

proceedings of 29th International Symposium on Space Technology and Science 2013

Katsunori Tamagawa, Rasmy Mohamed, Toshio Koike, Kumiko Tsujimoto, Kentaro Aida

Investigation of, he, Estimation of, Soil moisture, the Soil Parameter in, the Dry Season in, Cambodia, Using the La, Data Assimilation, System Developed at the, University of Tokyo, LDAS-UT

SANE 113 ( 88 ) 31 - 34 2013

Development of a coupled model of a distributed hydrological model and a rice growth model for grasping necessary information for rain-fed agriculture Reviewed

Kumiko Tsujimoto, Koki Homma, Toshio Koike, Tetsu Ohta

The Journal of Japan Society of Civil Engineers 69 ( 4 ) I_511 - I_516 2013

Katsunori Tamagawa, Mohamed Rasmy, Kentaro Aida, Kumiko Tsujimoto, Toshio Koike, Monichoth So Im, Tomoyuki Nukui, Shin'ichi Sobue

proceedings of 29th International Symposium on Space Technology and Science 2013

Validation of satellite precipitation products over Cambodia

Kumiko TsujimotoKumiko Tsujimoto, Toshio Koike, Monichoth So Im, Kentaro Aida, Katsunori Tamagawa, Tomoyuki Nukui, Shin'ichi Sobue

proceedings of 29th International Symposium on Space Technology and Science 12 ( ists29 ) Tn_41 - Tn_46 2013

Two diurnal cycle systems with different spatial scales and their effects on the post-monsoon rainfall in the inland of the Indochina Peninsula Reviewed

Kumiko Tsujimoto, Toshio Koike

The Journal of Japan Society of Civil Engineers 68 ( 4 ) I_451 - I_456 2012

Requisite Conditions for post-monsoon rainfall in Cambodia by looking through 2009 rainfall data Invited Reviewed

Kumiko Tsujimoto, Toshio Koike

Journal of Hydroscience and Hydraulic Engineering 30 ( 1 ) 1 - 14 2012

Interaction of large-scale atmospheric condition and local circulation which affects Cambodian post-monsoon rainfalls Reviewed

Kumiko Tsujimoto, Toshio Koike

The Journal of Japan Society of Civil Engineers 67 ( 4 ) I_463 - I_468 2011

GEWEX/iLEAPS合同国際会議参加報告 Invited Reviewed

萬和明, 山崎大, 吉田龍平, 新田友子, Pokhrel,Y, 辻本久美子, 平林由希子, 田中賢治, 檜山哲哉

水文・水資源学会誌 23 ( 1 ) 83 - 91 2010

Effects of the locally-induced precipitation of the stream flow during the dry season at the vicinities of Tonle Sap Lake Reviewed

Kumiko Tsujimoto, Toshio Koike

Annual Journal of Hydraulic Engineering 53 337 - 342 2009

メコン河下流域における湖と大気水循環の相互作用と地域水利用への影響

辻本久美子

東京大学 2009

Seasonal changes in radiation and evaporation implied from the diurnal distribution of rainfall in the Lower Mekong Reviewed

Tsujimoto Kumiko, Masumoto Takao, Mitsuno Toru

HYDROLOGICAL PROCESSES 22 ( 9 ) 1257 - 1266 2008.4

Language：English Publishing type：Research paper (scientific journal) Publisher：WILEY

Solar radiation is an important input to many empirical equations for estimating evaporation, which in turn plays all important role in the hydrologic cycle in the Lower Mekong River Basin due to the high evaporation potential of the tropical monsoon climate. Few proper meteorological data exist for the Lower Mekong River Basin, however, and the region's meteorological conditions, including seasonal variation in radiation and evaporation, have not been clarified. In this study, ground-based hourly hydrometeorological data were collected at three observation stations located in different land-Use types (urban district, paddy area, and lake) in the Lower Mekong River Basin. These data were analysed to investigate the seasonal variation ill radiation and evaporation related to the diurnal distribution of rainfall. Contrary to common expectations, our results showed that rainy and dry seasons had nearly the same amount of solar radiation in the Lower Mekong River Basin because (1) rainy seasons had a relatively larger amount of extraterrestrial radiation; (2) no rain fell oil nearly half of the days during rainy seasons; and (3) the amount of solar radiation on rainy days reached 88% of that on non-rainy days. The third factor was attributed to the high frequency of evening rainfall. Furthermore, this rainfall-radiation relationship meant that rainy seasons had a large amount of net radiation due to the low reduction ratio of solar radiation and an increase in long-wave incoming radiation. Accordingly, rainy seasons had a high evaporation potential. Moreover, for the rain-fed rice paddies that prevail in this region, sufficient radiation during the rainy season Would be a great advantage for rice growing. Copyright (C) 2008 John Wiley & Soils, Ltd.

DOI： 10.1002/hyp.6935

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Papers - TSUJIMOTO Kumiko