Journal of Hydrology-Regional Studies最新文献

Integrated operation of sand dam and groundwater dam to increase water supply capacity in mountainous areas of Chuncheon, South Korea 综合利用砂坝和地下水坝提高韩国春川山区的供水能力

IF 4.7 2区地球科学

Journal of Hydrology-Regional Studies Pub Date : 2024-09-07 DOI: 10.1016/j.ejrh.2024.101959

{"title":"Integrated operation of sand dam and groundwater dam to increase water supply capacity in mountainous areas of Chuncheon, South Korea","authors":"","doi":"10.1016/j.ejrh.2024.101959","DOIUrl":"10.1016/j.ejrh.2024.101959","url":null,"abstract":"<div><h3>Study region</h3><p>A valley area in South Korea</p></div><div><h3>Study focus</h3><p>Sand dams are cost-effective water-storage facilities for water-stressed areas in arid and semi-arid climates, with the advantages of reducing evaporation losses and filtering pollutants. Generally, sand dams are constructed by placing a horizontal barrier across the river bed, creating a naturally sand-filled structure upstream. Unlike this typical construction, a sand dam in Korea in the monsoon climate region was built near a mountainous valley, not in a stream, in Mulori, Chuncheon City, to ensure a sustainable water supply throughout the year, and especially to prevent freezing in the winter. Furthermore, a small-scale groundwater dam was additionally constructed downstream of the sand dam to increase the water supply capacity in preparation for severe droughts. In this study, the hydrological reservoir-routing simulations were performed to evaluate the effects of the combined use of the two dams on increasing water supply.</p></div><div><h3>New hydrological insights for the region</h3><p>Daily discharge rates for the period from March 16, 2020 to July 6, 2022 were simulated for several hybrid operations that supplies water primarily through the sand dam under the normal conditions, but combines both water sources to manage severe droughts. The simulated results showed that, compared with operating the sand dam alone, the hybrid operations could satisfy the village’s water demand by increasing the minimum water supply rates by 24.6–50.0 m³/day for different simulation conditions. The combined use of sand and groundwater dams presented in this study will help provide sustainable water supply in water-stressed areas, especially mountainous uplands vulnerable to droughts and freezes.</p></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2214581824003082/pdfft?md5=0ebb60ee991559c4e257ef492009f335&pid=1-s2.0-S2214581824003082-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142148143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Impact of water marketization mechanisms on improving water use efficiency: An empirical study from water rights trading in China 水市场化机制对提高用水效率的影响：中国水权交易实证研究

IF 4.7 2区地球科学

Journal of Hydrology-Regional Studies Pub Date : 2024-09-07 DOI: 10.1016/j.ejrh.2024.101957

{"title":"The Impact of water marketization mechanisms on improving water use efficiency: An empirical study from water rights trading in China","authors":"","doi":"10.1016/j.ejrh.2024.101957","DOIUrl":"10.1016/j.ejrh.2024.101957","url":null,"abstract":"<div><h3>Study Region</h3><p>China.</p></div><div><h3>Study Focus</h3><p>Water resources are one of the indispensable and irreplaceable natural resources in the operation of social and economic sustainable development. When economic measures are used to manage water resources, the market mechanism can be used to fully optimize resource allocation and boost water use efficiency (WUE). While existing research have begun to explore the impact of water rights trading (WRT) on WUE, most remain theoretical, with empirical studies often neglecting time differences in WRT implementation across provinces, leading to unresolved endogeneity issues. To accurately assess the policy effects of WRT, our research constructs a multi-period DID mode that addresses these limitations.</p></div><div><h3>New Hydrological Insights for the Regions</h3><p>This study reveals that WRT significantly improves WUE, with water use per unit of output decreasing by 574.724 units in agriculture, 366.136 units in industry, and 210.770 units overall, demonstrating robustness. The policy effects of WRT require time to materialize, showing both dynamic and spatial sustainability. Technological innovation (TEIN) and water factor mobility (FM) serve as intermediary variables through which WRT optimizes WUE, with TEIN exhibiting a masking effect on WUE improvement. These insights can contribute to improved water resource management globally by guiding the development of tailored water rights policies and strategies that incorporate market mechanisms, foster technological innovation, and improve overall WUE.</p></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2214581824003069/pdfft?md5=7ecd4996849eac3086be58bc211c6a40&pid=1-s2.0-S2214581824003069-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142148142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reservoir dominated spatio-temporal changes of the surface water area in the Yangtze River Basin during past three decades 过去三十年长江流域地表水面积的时空变化以水库为主

IF 4.7 2区地球科学

Journal of Hydrology-Regional Studies Pub Date : 2024-09-06 DOI: 10.1016/j.ejrh.2024.101948

{"title":"Reservoir dominated spatio-temporal changes of the surface water area in the Yangtze River Basin during past three decades","authors":"","doi":"10.1016/j.ejrh.2024.101948","DOIUrl":"10.1016/j.ejrh.2024.101948","url":null,"abstract":"<div><h3>Study area</h3><p>Yangtze River Basin, China.</p></div><div><h3>Study focus</h3><p>The surface water area (SWA) of the Yangtze River Basin (YRB) has changed significantly due to intensified human interferences. But no study investigated the variations in different water types and its drivers yet. To figure out the long-term changes in water bodies and the underlying driving forces, an improved method based on satellite data was developed to accurately delineate the seasonal SWA of the YRB from 1990 to 2020. Changes in different categories (reservoirs, lakes, and rivers) of water bodies are discriminated and attributed to various climatic and anthropogenic factors.</p></div><div><h3>New hydrological insights for the region</h3><p>Trend of the total SWA in the YRB was non-significant, but obvious changes happened at sub-basin scale. The SWA in the source region and upper reaches demonstrated an upward trend, while a decline was observed in the middle and lower reaches. The increase is largely attributed to reservoir changes (70 %). While, the decreases are attributed to changes in lakes (45 %) and rivers (55 %). Attribution analysis reveals that climatic factors primarily drive the SWA changes in the source region (74 %), while human activities play a more substantial role in the upper reaches (64 %). For the middle and lower reaches, climate and human activities have equally influences. This study shed light on the significant impact of human activities on the redistribution of SWA.</p></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2214581824002970/pdfft?md5=6081920be8848e220880da8195229808&pid=1-s2.0-S2214581824002970-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142148258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Testing trends in gridded rainfall datasets at relevant hydrological scales: A comparative study with regional ground observations in Southern Italy 在相关水文尺度上测试网格降雨数据集的趋势：与意大利南部地区地面观测数据的比较研究

IF 4.7 2区地球科学

Journal of Hydrology-Regional Studies Pub Date : 2024-09-06 DOI: 10.1016/j.ejrh.2024.101950

{"title":"Testing trends in gridded rainfall datasets at relevant hydrological scales: A comparative study with regional ground observations in Southern Italy","authors":"","doi":"10.1016/j.ejrh.2024.101950","DOIUrl":"10.1016/j.ejrh.2024.101950","url":null,"abstract":"<div><h3>Study region</h3><p>In this study, we compared the spatiotemporal evolution of rainfall trends in E-OBS and ERA5 to those detected using historical rainfall series recorded by ground-based networks in Southern Italy. In particular, the study is applied to the Campania, Basilicata, Apulia, Calabria and Sicily regions (84,000 km<sup>2</sup> in total) on seasonal and annual scales.</p></div><div><h3>Study focus</h3><p>Meteorological gridded datasets at large spatial scales are widely used in many hydroclimatic applications as they provide long and spatially homogeneous records. Regional trend analyses based on these data need to be treated with caution due to some potential limitations at relevant hydrological scales, such as the coarse spatial resolution and the spatio-temporal inhomogeneity of the underlying data. Gradual trends and abrupt change points were studied on rainfall data from 1979 to 2019.</p></div><div><h3>New hydrological insights for the region</h3><p>Both gridded datasets capture the major trends in observed rainfall, with a predominance of positive values driven by changes in September-November. Overall, ERA5 returns flatter results compared to E-OBS, with the former comparing well with observations in Sicily and Apulia, while the latter is performing well in Campania and partially in Calabria and Basilicata. Most statistically significant trends are associated with discontinuities in the early 2000s, and this is well captured by both ground and gridded datasets. The general behavior in inter-annual variability trends in Southern Italy is captured by both datasets, with ERA5 also detecting regional patterns.</p></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2214581824002994/pdfft?md5=c5d830c27ec0a2f39009583d4d03a223&pid=1-s2.0-S2214581824002994-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142148257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Estimation of seasonal precipitation memory curves for major rivers in the Tibetan Plateau based on GRACE satellites data 基于 GRACE 卫星数据的青藏高原主要河流季节降水记忆曲线估算

IF 4.7 2区地球科学

Journal of Hydrology-Regional Studies Pub Date : 2024-09-06 DOI: 10.1016/j.ejrh.2024.101942

{"title":"Estimation of seasonal precipitation memory curves for major rivers in the Tibetan Plateau based on GRACE satellites data","authors":"","doi":"10.1016/j.ejrh.2024.101942","DOIUrl":"10.1016/j.ejrh.2024.101942","url":null,"abstract":"<div><h3>Study region</h3><p>River basins in the Tibetan Plateau, including the Yarlung Zangbo River (YZR) basin, the Salween River (SWR) basin, the Lancang River (LCR) basin, the Yangtze River (YTR) basin, the Yellow River (YLR) basin, and the Tarim River (TRM) basin.</p></div><div><h3>Study focus</h3><p>In recent years, the concept of seasonal catchment memory has emerged as a pivotal element in the field of hydrological science. Precipitation memory curve (PMC) is a good method to describe seasonal precipitation memory process, which is the key function connecting precipitation and terrestrial water storage change (TWSC). The model simulated TWSC with precipitation is proposed based on PMC. According to the performance of the model, this study investigates optimal curve functions to describe seasonal catchment memory in the Tibetan Plateau.</p></div><div><h3>New hydrological insights for the region</h3><p>It is found that in most basins, the shape of PMC is consistent with the Boussinesq function or Maillet function. In the SWR basin, PMC varies between warm season and cold season. However, due to relatively less precipitation in the cold season compared to the warm season, the segmented-representation PMC has only a slight improvement on the TWSC simulation. In the TRM basin, the temperature-index method can improve the performance of the model. The PMC of the TRM basin during the warm season exhibits a short duration of precipitation memory of approximately three months.</p></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S221458182400291X/pdfft?md5=3671007c098584d2be86d9010a88fd55&pid=1-s2.0-S221458182400291X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142148256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Paleohydrology repeating? Regional hydrological change may lead to an overflow and cross-mixing of an alkaline and a freshwater lake in East Africa 古水文学在重复？区域水文变化可能导致东非一个碱湖和一个淡水湖的溢流和交叉混合

IF 4.7 2区地球科学

Journal of Hydrology-Regional Studies Pub Date : 2024-09-06 DOI: 10.1016/j.ejrh.2024.101951

{"title":"Paleohydrology repeating? Regional hydrological change may lead to an overflow and cross-mixing of an alkaline and a freshwater lake in East Africa","authors":"","doi":"10.1016/j.ejrh.2024.101951","DOIUrl":"10.1016/j.ejrh.2024.101951","url":null,"abstract":"<div><h3>Study region</h3><p>Lake Bogoria and Lake Baringo, Rift Valley, Kenya</p></div><div><h3>Study focus</h3><p>Starting around 2010, several of Kenya’s Rift Valley lakes experienced significant rises in water levels. There is presently fear of an ecological catastrophe should the water levels of the alkaline Lake Bogoria continue to rise and subsequently overflow into and cross-mix with the freshwater Lake Baringo, a hydrological situation witnessed ∼8 000–10 000 years ago.</p></div><div><h3>New hydrological insights into the region</h3><p>In the last decade, data reveals significant meteorological and hydrological changes in the study region. Average annual rainfall has more than doubled, with substantial increases in variability. Despite a decrease in the number of rainy days within this period, intense rainfall days have increased by 318 %. Relative to the maximum water level observed in 2020, a 0.7 m increase in lake level would be sufficient for Lake Bogoria to reach the spill point located at about 1000.2 m, beyond which an overflow into Lake Baringo begins to occur. In 2023, the lake level declined by 1.5 m, resulting in a decreased risk of overflow of ∼20 %. Results indicate that mean annual rainfall after 2010 was high enough to provide an average annual flow of 500–1000 L/s from Lake Bogoria towards Baringo if lake levels were at spill point elevation.</p></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2214581824003008/pdfft?md5=188a417e740f3aac5f2881674c91faff&pid=1-s2.0-S2214581824003008-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142148259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Asynchronous recovery of evaporation and transpiration following extreme snow damage in a subtropical forest 亚热带森林遭受极端雪害后蒸发和蒸腾作用的非同步恢复

IF 4.7 2区地球科学

Journal of Hydrology-Regional Studies Pub Date : 2024-09-04 DOI: 10.1016/j.ejrh.2024.101947

{"title":"Asynchronous recovery of evaporation and transpiration following extreme snow damage in a subtropical forest","authors":"","doi":"10.1016/j.ejrh.2024.101947","DOIUrl":"10.1016/j.ejrh.2024.101947","url":null,"abstract":"<div><p><em>Study region:</em> The Ailaoshan National Nature Reserve forest is a mountainous water catchment area for the Lancang River basin and a subtropical ecological conservation area in southwest China. <em>Study focus:</em> The study aimed to understand how water fluxes in a subtropical forest responds to extreme weather disturbances and their recoveries in the post-damage years. We used eddy covariance data (2010–2019) to investigate the evapotranspiration (ET), transpiration (T), evaporation (E), and canopy conductance (Gc) before and after an extreme snow event in 2015. <em>New Hydrological Insights:</em> In the snow damage year, the leaf area index (LAI) decreased by 49 % compared to the pre-damage levels. The severe vegetation damage caused a significant decrease in ET, T, E, and Gc by 35 %, 36 %, 23 %, and 33 %, respectively, compared to the pre-damage levels. T returned to its pre-damage level in 2016, one year after the snow damage. In contrast, LAI, ET, E and Gc recovered to their pre-damage levels in 2018, four years after the initial damage. Reduced ET caused a strong positive RF<sub>ET</sub>, which diminished forest evaporative cooling and resilience. Our results suggest that the delayed E recovery enables water reserves in the ecosystems to be used through T to support rapid understory vegetation growth. This mechanism plays critical in bolstering ecosystem resilience as it facilitates swift recovery following disturbances in subtropical forests.</p></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2214581824002969/pdfft?md5=c116713a14109f89bc5c34cdf04a5092&pid=1-s2.0-S2214581824002969-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142136286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Responses of hydrological processes to vegetation greening and climate change in subtropical watersheds 水文过程对亚热带流域植被绿化和气候变化的响应

IF 4.7 2区地球科学

Journal of Hydrology-Regional Studies Pub Date : 2024-09-04 DOI: 10.1016/j.ejrh.2024.101946

{"title":"Responses of hydrological processes to vegetation greening and climate change in subtropical watersheds","authors":"","doi":"10.1016/j.ejrh.2024.101946","DOIUrl":"10.1016/j.ejrh.2024.101946","url":null,"abstract":"<div><h3>Study region</h3><p>Xiangjiang River Basin (XRB) in subtropical China.</p></div><div><h3>Study focus</h3><p>Vegetation changes have a substantial impact on the water cycle in watersheds. However, the responses of hydrological processes to vegetation changes in subtropical regions have not yet been thoroughly clarified. The primary objectives of this study were to quantify the sensitivity of hydrological variables to vegetation changes and to elucidate the contributions of vegetation greening and climatic changes to alterations in hydrological variables in the Xiangjiang River Basin (XRB).</p></div><div><h3>New hydrological insights for the region</h3><p>Evapotranspiration (ET) exhibits a significant positive sensitivity to alterations in Leaf Area Index (LAI) in the XRB, while soil water storage (SW) and flow depth (Q) showed a significant negative sensitivity to LAI changes. Changes in LAI primarily result in increased ET and reduced SW and Q, while increased in precipitation leads to augmented ET, SW, and Q. Alterations in potential evapotranspiration have been associated with heightened ET and reduced SW and Q. From the perspective of relative contributions, LAI predominantly influences alterations in ET within the XRB; P and PET are the primary driver of shifts in SW; and P chiefly governs the variations in Q. Our results highlight the important impact of vegetation changes on hydrological variables in subtropical watersheds.</p></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2214581824002957/pdfft?md5=f12d09f5821ff3f6b85ac91099e4c1bb&pid=1-s2.0-S2214581824002957-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142136287","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Geospatial stable isotopes signatures of groundwater in United Arab Emirates using machine learning 利用机器学习分析阿拉伯联合酋长国地下水的地理空间稳定同位素特征

IF 4.7 2区地球科学

Journal of Hydrology-Regional Studies Pub Date : 2024-09-04 DOI: 10.1016/j.ejrh.2024.101938

{"title":"Geospatial stable isotopes signatures of groundwater in United Arab Emirates using machine learning","authors":"","doi":"10.1016/j.ejrh.2024.101938","DOIUrl":"10.1016/j.ejrh.2024.101938","url":null,"abstract":"<div><h3>Study region</h3><p>The research is conducted in United Arab Emirates (UAE) where limited water resources are negatively impacted by both natural and human-induced factors.</p></div><div><h3>Study focus</h3><p>The focus of this study is to establish a cost-effective and accessible isotopic database to identify the sources of recharging country-wide aquifers in UAE. The hydrogen (δ<sup>2</sup>H) and oxygen (δ<sup>18</sup>O) data of five aquifer systems is integrated into a publicly accessible web mapping application. In addition, the Machine Learning (ML) approach is employed to develop a novel isotopic boundary clustering tool for the various aquifers.</p></div><div><h3>New hydrological insights</h3><p>The results indicate a cost - time-effective web application could assist in any future research. The results also revealed that (1) the eastern gravel plain, ophiolite, and northern carbonate aquifers are isotopically comparable, indicating a recharge by modern precipitation, (2) Mixing and upward leakage along the deep-seated faults with modern precipitation is reflected by the isotopic signature of Jabel Hafeet carbonate aquifer and (3) The isotopic values of the coastal aquifers suggested an impact of the sea water intrusion. The ML clustering categorized the isotopic data into four main boundary decision zones (DZ) that are different from the aquifer boundaries indicating various recharge sources. This study provides a new country wide geospatial stable isotope distribution of groundwater which is vital for the sustainable management of water resources in arid regions.</p></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2214581824002878/pdfft?md5=65370be363bc789cc64c0cc5f4d01146&pid=1-s2.0-S2214581824002878-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142136285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Estimation of design precipitation using weather radar in Germany: A comparison of statistical methods 德国利用天气雷达估算设计降水量：统计方法比较

IF 4.7 2区地球科学

Journal of Hydrology-Regional Studies Pub Date : 2024-09-02 DOI: 10.1016/j.ejrh.2024.101952

{"title":"Estimation of design precipitation using weather radar in Germany: A comparison of statistical methods","authors":"","doi":"10.1016/j.ejrh.2024.101952","DOIUrl":"10.1016/j.ejrh.2024.101952","url":null,"abstract":"<div><h3>Study region:</h3><p>Germany.</p></div><div><h3>Study focus:</h3><p>Estimation of precipitation return levels on various temporal scales and with high spatial resolution is crucial for risk management and hydrological applications. Weather radars may provide this information, but design precipitation estimates from these instruments suffer from estimation biases and from the limited length of the available records. Here, the performance of two statistical methods for deriving design precipitation from 20 years of radar data for Germany is investigated: (a) a method based on peaks-over-threshold and an exponential distribution, operationally used for decades to compute design precipitation in Germany (DWA); and (b) a non-asymptotic approach that was recently shown to reduce estimation uncertainties related to short records (SMEV). The most recent official design precipitation for Germany derived from station data (KOSTRA-DWD-2020) are used as a benchmark.</p></div><div><h3>New Hydrological Insights for the Region</h3><p>Design precipitation from radar data tends to be lower than those derived from stations, due to the scale mismatch (point scale versus <span><math><mrow><mo>∼</mo><mn>1</mn><mspace></mspace><msup><mrow><mi>km</mi></mrow><mrow><mn>2</mn></mrow></msup></mrow></math></span> of radar) and to biases in radar estimates of extremes. SMEV tends to underestimate more than DWA, especially for short durations. Larger uncertainties are reported for the DWA method, while SMEV estimates tend to be more stable and less influenced by statistical outliers. Application of the KOSTRA-DWD-2020 method on radar data leads to results closer to SMEV.</p></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":null,"pages":null},"PeriodicalIF":4.7,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S221458182400301X/pdfft?md5=05b6b5cf108293b0838f2c9718dfe247&pid=1-s2.0-S221458182400301X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142122336","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0