Vadose Zone Journal最新文献_第10页

The role of hydropedology when aiming for the United Nations Sustainable Development Goals 水文学在实现联合国可持续发展目标中的作用

IF 2.8 3区地球科学

Vadose Zone Journal Pub Date : 2023-07-14 DOI: 10.1002/vzj2.20269

J. Bouma

引用次数: 2

Cover Image, Volume 22, Issue 4 封面图片，第22卷，第4期

IF 2.8 3区地球科学

Vadose Zone Journal Pub Date : 2023-07-14 DOI: 10.1002/vzj2.20271

引用次数: 0

Thanks to Reviewers, Vadose Zone Journal, 2022 感谢评审员，Vadose Zone Journal, 2022

IF 2.8 3区地球科学

Vadose Zone Journal Pub Date : 2023-07-01 DOI: 10.1002/vzj2.20261

引用次数: 0

Bromide reactivity in topsoil: Implications for use as a “conservative” tracer in assessing quantity and quality of water 表层土中的溴反应性：在评估水量和水质时用作“保守”示踪剂的意义

IF 2.8 3区地球科学

Vadose Zone Journal Pub Date : 2023-06-06 DOI: 10.1002/vzj2.20260

C. Albers, A. Rosenbom

引用次数: 0

Determining groundwater recharge for quantifying PFAS mass discharge from unsaturated source zones 确定地下水补给量以量化非饱和源区PFAS的总量排放

IF 2.8 3区地球科学

Vadose Zone Journal Pub Date : 2023-06-05 DOI: 10.1002/vzj2.20262

C. Newell, Emily B. Stockwell, Jessica Alanis, D. Adamson, Kenneth L. Walker, R. Anderson

{"title":"Determining groundwater recharge for quantifying PFAS mass discharge from unsaturated source zones","authors":"C. Newell, Emily B. Stockwell, Jessica Alanis, D. Adamson, Kenneth L. Walker, R. Anderson","doi":"10.1002/vzj2.20262","DOIUrl":"https://doi.org/10.1002/vzj2.20262","url":null,"abstract":"Soil‐to‐groundwater contaminant mass discharge (Md) is the authoritative metric defining source strength at sites impacted by per‐ and polyfluoroalkyl substances (PFAS) and is increasingly being reported. Accurate estimates of groundwater recharge at representative spatial scales, however, is critical to quantitatively estimating Md, which to date has received comparatively little attention relative to PFAS‐specific partitioning and retention processes within unsaturated zone source areas despite a plethora of available literature. The objective of this review is to summarize the concept of Md as it applies to PFAS‐impacted sites, present standardized terminology, and collate published literature on groundwater recharge for a practitioner‐level summary of practical methods. Critically, the primary aim is to reduce uncertainty in recharge (and, thus, Md) estimates commensurate to a given site management application (i.e., the data quality objective process). Therefore, we propose a tiered system of increasing cost, complexity, and certainty depending on specific project requirements and site conditions and recommend applicable recharge methods for each tier based on these factors. Ultimately, a framework is presented for the assessment of PFAS‐impacted source areas based on the concept of Md.","PeriodicalId":23594,"journal":{"name":"Vadose Zone Journal","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45916523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Delineating soil moisture dynamics within an evapotranspiration surface barrier using spatial‐temporal analysis 利用时空分析描述蒸散发表面屏障内的土壤水分动态

IF 2.8 3区地球科学

Vadose Zone Journal Pub Date : 2023-05-25 DOI: 10.1002/vzj2.20256

Z. Zhang, S. Mehta, M. Bergeron

{"title":"Delineating soil moisture dynamics within an evapotranspiration surface barrier using spatial‐temporal analysis","authors":"Z. Zhang, S. Mehta, M. Bergeron","doi":"10.1002/vzj2.20256","DOIUrl":"https://doi.org/10.1002/vzj2.20256","url":null,"abstract":"Evapotranspiration (ET) surface barriers store infiltrated precipitation during the recharge period and release the stored water to the atmosphere via ET. The primary purpose of a surface barrier is to reduce or eliminate drainage to the underlying waste zone. The objective of this study is to analyze the spatial and temporal dynamics of soil moisture within an ET surface barrier based on observed and simulated data. This study characterizes the water movement processes using contour plots of soil moisture content and flux rate in the depth‐time domain. Zero‐flux planes (ZFPs) divide the depth‐time domain into stored water, ET, and drainage zones. Some flow dynamics (e.g., flow rate and direction) that were not observed in the field were elaborated with simulation results to identify the depth of the recharge front of infiltrated water, the release front of stored water, and the bottom of the ET zone. The ET‐drainage divide marks the bottom of the ET zone and the top of the drainage zone. The results showed that the temporal analysis of soil moisture storage could indicate the degree of usage of the storage capacity of a surface barrier. The spatial‐temporal analyses of soil moisture content and flux rate can characterize the durations of the recharge/release processes and the depth of the stored water. Quantification of these processes and related zones provides beneficial understanding of the state and dynamics of soil moisture for a range of weather and vegetation conditions and is useful in optimizing the design of an ET surface barrier.","PeriodicalId":23594,"journal":{"name":"Vadose Zone Journal","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45985314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cover Image, Volume 22, Issue 3 封面图片，第22卷，第3期

IF 2.8 3区地球科学

Vadose Zone Journal Pub Date : 2023-05-10 DOI: 10.1002/vzj2.20263

引用次数: 0

Trends in regolith thickness in a headwater catchment, Sierra Nevada, California 加利福尼亚州内华达山脉源头集水区表土厚度趋势

IF 2.8 3区地球科学

Vadose Zone Journal Pub Date : 2023-05-10 DOI: 10.1002/vzj2.20259

R. Ferrell, Scott M. Devine, A. O’Geen

{"title":"Trends in regolith thickness in a headwater catchment, Sierra Nevada, California","authors":"R. Ferrell, Scott M. Devine, A. O’Geen","doi":"10.1002/vzj2.20259","DOIUrl":"https://doi.org/10.1002/vzj2.20259","url":null,"abstract":"Rooting in deep regolith enables forests to withstand seasonal and annual precipitation shortfalls. Despite its ecological importance, spatial patterns in regolith thickness within forest ecosystems are scarcely documented. Regolith thickness was estimated at 66 sites throughout a 543‐ha watershed in the southern Sierra Nevada by hand auger to point of failure or a maximum depth of 7.5 m, describing a minimum thickness estimate. Regolith consists of 1–2 m of soil overlying thick and porous weathered granodiorite. Depth to auger failure ranged from 1.52 to an indeterminate depth beyond 7.5 m. A total of 27 points exceeded 7.5 m depth. Normal, lognormal, and gamma data distribution models were fitted to observations to extrapolate thickness across the watershed and estimate thicknesses beyond the measurement limitation. Predictions for the 95th percentile of regolith thickness varied substantially; 26.05 m for lognormal, 16.87 m for gamma, and 9.56 m for normal. Considering any best fit model, >55% of the watershed area was deeper than 5 m. Depth classes were formed to evaluate the extent to which topography is associated with spatial trends in regolith thickness. Spatial patterns were related to two covariate proxies (distance from stream channel and topographic wetness) with the general landscape trend of shallow depth classes (<3.3 m) in lowlands and deeper regolith classes (>7.5 m) in uplands. The normalized difference vegetation index signatures over the late stages of a 5‐year drought were greener in the lowlands. In contrast, upland forests displayed widespread tree die‐off, suggesting deep water storage does not maintain forests over long‐term drought.","PeriodicalId":23594,"journal":{"name":"Vadose Zone Journal","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49398873","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quantification of data‐related uncertainty of spatially dense soil moisture patterns on the small catchment scale estimated using unsupervised multiple regression 使用无监督多元回归估计的小流域尺度上空间密集土壤水分模式的数据相关不确定性的量化

IF 2.8 3区地球科学

Vadose Zone Journal Pub Date : 2023-05-10 DOI: 10.1002/vzj2.20258

H. Paasche, Ingmar Schröter

{"title":"Quantification of data‐related uncertainty of spatially dense soil moisture patterns on the small catchment scale estimated using unsupervised multiple regression","authors":"H. Paasche, Ingmar Schröter","doi":"10.1002/vzj2.20258","DOIUrl":"https://doi.org/10.1002/vzj2.20258","url":null,"abstract":"Multiple regression analysis is a valuable method to reduce information gaps in a sparse soil moisture data set by fusing its information content with those of densely mapped data sets. Regression analysis utilizing uncertain data results in an indeterminate regression model and indeterminate soil moisture predictions when applying the regression model. We employ an unsupervised multiple regression approaches, taking optimally located sparse soil moisture measurements directly as coefficients in a linear regression model. We propagate data uncertainties into our probabilistic soil moisture estimation results by embedding the regression in a Monte Carlo approach. The computed uncertainty defines the quantitative limit for information retrieval from the resultant ensemble of soil moisture maps. This raises doubts on the true presence of some prominent channel‐like features of increased soil moisture that are clearly visible in a previously and deterministically derived soil moisture map ignoring the presence of data uncertainty. The approach followed in this work is computationally simple and could be applied routinely to databases of similar size. Insufficient uncertainty communication by the data provider became the biggest obstacle in our efforts and led us to the insight that the geoscientific community may need to revise their standards with regard to uncertainty communication related to measured and processed data.","PeriodicalId":23594,"journal":{"name":"Vadose Zone Journal","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49657459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Soil thermal properties during freeze–thaw dynamics as function of variable organic carbon and grain size distribution 冻融过程中土壤热特性随有机碳和粒度分布的变化

IF 2.8 3区地球科学

Vadose Zone Journal Pub Date : 2023-04-24 DOI: 10.1002/vzj2.20252

Jelte G. H. de Bruin, V. Bense, M. J. van der Ploeg

{"title":"Soil thermal properties during freeze–thaw dynamics as function of variable organic carbon and grain size distribution","authors":"Jelte G. H. de Bruin, V. Bense, M. J. van der Ploeg","doi":"10.1002/vzj2.20252","DOIUrl":"https://doi.org/10.1002/vzj2.20252","url":null,"abstract":"Permafrost regions are experiencing increasing air temperatures, accelerating the thawing process, and thickening the active layer in summer. This can accelerate the release of greenhouse gasses into the atmosphere from the organic carbon stored in the permafrost. The long‐term thawing rates of permafrost below the active layer are governed by the soil thermal properties, the heat capacity, and thermal conductivity, which vary due to differences in grain sizes and distribution and organic matter content. Using nine column experiments comprised of fully saturated synthetic permafrost samples exposed to freeze–thaw cycles, the relative contributions of a range of soil grain sizes and organic matter contents on the soil thermal properties were investigated. The columns were subjected to a freeze and thaw cycle while soil temperatures were recorded in profiles. To infer the thermal properties from these experimental data, a numerical heat transfer model was used. The best fit between the observations and a batch of 5544 numerical models was used to find optimum values for permafrost thermal properties. The optimized heat capacity varied between 500 and 650 (J/m3 K) and thermal conductivity between 2.45 and 3.55 (W/m K). These optimized parameters were subsequently used to model a 100‐year permafrost active layer thaw scenario under warming air temperatures. Variations in the optimized thermal properties resulted in a time difference in thawing depth of 10–15 years and thawing depths varied between 9 and 10 m between the different optimized thermal properties at the end of the 100‐year scenario.","PeriodicalId":23594,"journal":{"name":"Vadose Zone Journal","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46992854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0