Hydrological Research Letters最新文献_第2页

Relationship between newly fallen snow density and degree of riming estimated by particles’ fall speed in Niigata Prefecture, Japan 日本新泻县新降雪量与颗粒下落速度估算的霜冻程度的关系

IF 1.1

Hydrological Research Letters Pub Date : 2022-01-01 DOI: 10.3178/hrl.16.87

Kazuya Takami, R. Kamamoto, Kenji Suzuki, K. Yamaguchi, E. Nakakita

引用次数: 1

Spatiotemporal variability of hydrogen stable isotopes at a local scale in shallow groundwater during the warm season in Tottori Prefecture, Japan 暖季日本鸟取县浅层地下水氢稳定同位素时空变化特征

IF 1.1

Hydrological Research Letters Pub Date : 2022-01-01 DOI: 10.3178/hrl.16.25

Y. Yoshioka, H. Yoshioka

引用次数: 1

A preliminary observation for quantifying detached stemflow 离体茎流定量的初步观察

IF 1.1

Hydrological Research Letters Pub Date : 2022-01-01 DOI: 10.3178/hrl.16.1

K. Shiraki, S. Kawana, Haruna Tsujinaka, Sakura Ariyoshi, Y. Uchiyama

{"title":"A preliminary observation for quantifying detached stemflow","authors":"K. Shiraki, S. Kawana, Haruna Tsujinaka, Sakura Ariyoshi, Y. Uchiyama","doi":"10.3178/hrl.16.1","DOIUrl":"https://doi.org/10.3178/hrl.16.1","url":null,"abstract":": Detached stemflow has been defined as rainwater that breaks away from the stemflow and falls around the trees as throughfall. Quantitative measurements of detached stem‐ flow were taken for two sample broadleaf trees on the university campus. Zelkova, with smooth bark, has a tree structure that concentrates rainwater, producing a large amount of stemflow. A rainwater collection system installed around the trunk can capture large amounts of throughfall as detached stemflow. The detached stemflow amount had almost doubled in water height equivalent to throughfall at the tree stand. Therefore, some trees generate much throughfall in the forest near the trunk. In the case of the Katsura tree, however, the stemflow was low. The throughfall attributable to the detached stemflow was less than the average throughfall. This low stemflow generation was assumed to be due to the roughness of the Katsura bark. The rainwater which attaches to the trunk and branches breaks away easily. Presumably, the leaves near the trunk intercept raindrops and disperse the rainwater to the surroundings. The detached stemflow can constitute a large quantity. It can be expected to be related closely to the stemflow generation mechanism.","PeriodicalId":13111,"journal":{"name":"Hydrological Research Letters","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69394334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Yearly change in severely salt-damaged areas in paddy fields in Ban Phai in Northeast Thailand 泰国东北部班派严重盐害地区稻田的年变化

IF 1.1

Hydrological Research Letters Pub Date : 2022-01-01 DOI: 10.3178/hrl.16.7

Yi Yang, M. Maki, Rongling Ye, Daiki Saito, Thanyaluck Nontasri, M. Srisutham, Supranee Sritumboon, S. Sukchan, Koshi Yoshida, K. Oki, K. Homma

{"title":"Yearly change in severely salt-damaged areas in paddy fields in Ban Phai in Northeast Thailand","authors":"Yi Yang, M. Maki, Rongling Ye, Daiki Saito, Thanyaluck Nontasri, M. Srisutham, Supranee Sritumboon, S. Sukchan, Koshi Yoshida, K. Oki, K. Homma","doi":"10.3178/hrl.16.7","DOIUrl":"https://doi.org/10.3178/hrl.16.7","url":null,"abstract":": Future expansion of salt-damaged areas is anticipated in Northeast Thailand. We conducted a field investigation of paddy fields from 2016 to 2019 in Ban Phai district, Khon Kaen province in Northeast Thailand to evaluate yearly changes in the effect of salinity damage on rice production. The investigation area was classified into severely salt-affected areas (2 nd of 5 classes) based on the definition used in Thailand. Since salinity severely damages rice produc‐ tion, rice cultivation was abandoned in some fields, although some were still planted. The soil electrical con‐ ductivity (EC) in the rice-planted paddy fields changed yearly in association with the amount of precipitation. The effect of the difference in EC on rice yield was moderate, suggesting that rice yield was mediated by surface water. Some areas in the abandoned fields did not have any vege‐ tation, and quite high soil EC values were observed. The non-vegetated areas evaluated based on yearly unmanned aerial vehicle (UAV) images changed partly due to the amount of precipitation. However, some non-vegetated areas decreased in contrast to the decrease in precipitation, probably because of the effect of groundwater. Although the continuous expansion of severely salt-damaged areas was not observed, the monitoring of salinity levels is rec‐ ommended for the future.","PeriodicalId":13111,"journal":{"name":"Hydrological Research Letters","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69394990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Multi-model ensemble benchmark data for hydrological modeling in Japanese river basins 日本河流流域水文模拟的多模型集合基准数据

IF 1.1

Hydrological Research Letters Pub Date : 2022-01-01 DOI: 10.3178/hrl.16.73

Y. Sawada, S. Okugawa, Takayuki Kimizuka

{"title":"Multi-model ensemble benchmark data for hydrological modeling in Japanese river basins","authors":"Y. Sawada, S. Okugawa, Takayuki Kimizuka","doi":"10.3178/hrl.16.73","DOIUrl":"https://doi.org/10.3178/hrl.16.73","url":null,"abstract":": Verification processes of rainfall-runoff modeling are important to improve the skill of hydrological models to reproduce water cycles in river basins. It is ideal that newly developed models are compared with many benchmarking conventional models in many river basins as part of the ver‐ ification process. However, this robust verification is time-consuming if model developers prepare data and models from scratch. Here we present a useful dataset which can accelerate the robust verification of hydrological models. Our newly developed dataset, Multi-model Ensemble for Robust Verification of hydrological modeling in Japan (MERV-Jp), provides runoff simulation by 44 calibrated conceptual hydrological models in 135 Japanese river basins as well as meteorological forcing which is necessary to drive conceptual hydrological models. By comparing simulated runoff with river discharge observations which are not used for the calibration of hydrological models, we find that the best models in the 44 models can reproduce observed river runoff with KGE larger than 0.6 in most of the 135 river basins, so that the runoff simulation of MERV-Jp is reasonably accurate. MERV-Jp is publicly available to support all hydrological model developers to robustly verify their model improvement.","PeriodicalId":13111,"journal":{"name":"Hydrological Research Letters","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69395001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Estimating freshwater lens volume in highly permeable aquifers 估计高渗透性含水层的淡水透镜体体积

IF 1.1

Hydrological Research Letters Pub Date : 2022-01-01 DOI: 10.3178/hrl.16.12

Satoshi Tajima, Jiaqing Liu, T. Tokunaga

引用次数: 0

Socio-hydrological modeling and its issues in Japan: a case study in Naganuma District, Nagano City 日本的社会水文模型及其问题:以长野市长沼区为例

IF 1.1

Hydrological Research Letters Pub Date : 2022-01-01 DOI: 10.3178/hrl.16.32

Naoya Shibata, F. Nakai, Kensuke Otsuyama, Shinichiro Nakamura

引用次数: 3

Effects of geological differences on rainfall–runoff characteristics based on field measurements 基于野外测量的地质差异对降雨径流特征的影响

IF 1.1

Hydrological Research Letters Pub Date : 2022-01-01 DOI: 10.3178/hrl.16.80

Jun Inaoka, K. Kosugi, N. Masaoka, T. Itokazu, K. Nakamura, M. Fujimoto

引用次数: 1

Use of deep learning to identify optimal meteorological inputs to forecast seasonal precipitation 利用深度学习识别最佳气象输入以预测季节性降水

IF 1.1

Hydrological Research Letters Pub Date : 2022-01-01 DOI: 10.3178/hrl.16.67

Shingo Zenkoji, T. Tebakari, K. Sakakibara

引用次数: 0

Time-lapse electrical resistivity tomography for assessment of seasonal moisture variations in a tropical regolith 用于评估热带风化层季节性湿度变化的延时电阻率层析成像

IF 1.1

Hydrological Research Letters Pub Date : 2022-01-01 DOI: 10.3178/hrl.16.18

A. Mojica, Bolívar Duarte, F. Vergara, Milagros Pinto-Núñez, Reinhardt Pinzón, J. Pérez, María Gabriela Castrellón, Carlos A. Ho, M. Gómez

{"title":"Time-lapse electrical resistivity tomography for assessment of seasonal moisture variations in a tropical regolith","authors":"A. Mojica, Bolívar Duarte, F. Vergara, Milagros Pinto-Núñez, Reinhardt Pinzón, J. Pérez, María Gabriela Castrellón, Carlos A. Ho, M. Gómez","doi":"10.3178/hrl.16.18","DOIUrl":"https://doi.org/10.3178/hrl.16.18","url":null,"abstract":": Monitoring and quantifying hydrological flows in the vadose zone is complicated to analyze due to the effects of rainfall in the tropics, the dynamic interactions among rains, the vegetation layer, moisture in the soil, and the entire regolith. Quantifying subsurface hydrological flows at specific scales and high resolution presents further diffi‐ culties. To overcome these issues, resistivity methods can play an important role. This paper examines the results of gravimetric moisture content monitoring in the Panamanian tropics through time-lapse electrical resistivity tomography analysis. Changes in the electrical properties of soil were quantified through six tomographic tests performed between February 2012 and March 2013 along with a profile. Significant changes in resistivity were identified between February (dry season) and May, and August and October (rainy season), with negative percentages (–60%) indicating the effects of rain infiltration at the surface and positive percentages (60%) linked to moisture absorption in the soil, electrode relocation for each test or inversion pro‐ cesses. Additional laboratory analyses of soil samples were carried out to obtain gravimetric moisture content tomo‐ grams. The changes of this parameter in the subsurface horizons, and the percentage differences in the calculated resistivity values, are helpful for determining the impact of rain on the soils.","PeriodicalId":13111,"journal":{"name":"Hydrological Research Letters","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69394381","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2