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Record W3014040471 · doi:10.35552/anujr.a.31.1.1365

A Spatial Estimation of Groundwater Recharge in Southern Ontario, Canada

2017· article· en· W3014040471 on OpenAlexfundaboutno aff
Abdelhaleem Khader

Bibliographic record

VenueAn-Najah University Journal for Research - A (Natural Sciences) · 2017
Typearticle
Languageen
FieldEnvironmental Science
TopicHydrology and Watershed Management Studies
Canadian institutionsnot available
FundersMcMaster University
KeywordsGroundwater rechargeStreamflowHydrology (agriculture)GroundwaterEnvironmental sciencePrecipitationSurface runoffDepression-focused rechargeSpatial variabilityGroundwater modelGeologyAquiferGeographyMeteorologyStatisticsDrainage basinEcologyMathematics

Abstract

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Efficient management of groundwater resources is needed, due to their importance and susceptibility to depletion and contamination. This requires better understanding and accurate quantification of groundwater recharge, which is the main source for replenishment of groundwater aq-uifers. Choosing a method for estimating recharge is largely dependent on the objectives of recharge estimation, spatial and temporal scales, availability of data, and the available resources in terms of time and ex-pense. The focus of this paper is estimating the spatial distribution of groundwater recharge for the objective of designing a groundwater moni-toring network. In this case, the ability to capture spatial variation of re-charge is the key attribute of the chosen method for estimating recharge. At the same time, the data needed for the method should be readily available so that the method can be applied in different regions that might differ in data availability. Precipitation-Runoff Modeling System (PRMS) has been utilized in this paper to estimate recharge in a study area in southern Ontario, Canada. The data on climate, geomorphology and geology needed to parameterize the model, and streamflow data needed to calibrate and validate the model were available online from federal and provincial agencies websites. Calibration and validation results show a good match between simulated and observed streamflow. An independent estimate of recharge was provided by a recession-curve displacement method, which uses only streamflow data. A comparison of the two methods shows a large difference in recharge estimates due to fundamental differences in recharge definition. PRMS results will be used in the groundwater monitoring network design because they are spatially distributed, and because PRMS conceptual model better represents the physical processes. نظرا لأهمية الأحواض المائية الجوفية كمصدر أساسي للمياه العذبة، ولسهولة تعرض هذه الأحواض للتلوث، تنبع الحاجة لإدارة فعالة لهذه الأحواض. هذه الإدارة تستدعي فهما أعمق وأدق للتغذية لهذه الأحواض، والتي هي المصدر الأساسي لتجديد كميات المياه في هذه الأحواض. إن اختيار طريقة معينة لحساب كميات التغذية يعتمد بشكل كبير على الهدف من هذا الحساب والمقاييس الزمانية والمكانية وتوفر المعلومات اللازمة وتوفر الموارد المالية والوقت الكافي. تركز هذه الورقة البحثية على حساب التوزيع الجغرافي للتغذية بهدف تصميم شبكة مراقبة للمياه الجوفية. في هذه الحالة، من الأهمية بمكان قدرة الطريقة المختارة على معرفة تفاوت كميات التغذية وتوزيعها مكانيا. بالإضافة إلى ذلك، يجب أن تكون المعلومات اللازمة لهذه الطريقة يسهل توفيرها لكي يتسنى تطبيقها في مناطق مختلفة تتفاوت في المعلومات المتوفرة. في هذه الورقة، تم استخدام النموذج الرياضي لحساب التدفق من الهطول لحساب التغذية للأحواض الجوفية في منطقة جنوب مقاطعة أونتاريو في كندا. المعلومات المناخية والجيولوجية اللازمة للنمذجة تم الحصول عليها من المواقع الرسمية للجهات الحكومية المختصة على مستوى الدولة والمقاطعة. أظهرت نتائج معايرة والتحقق من صحة النموذج الرياضي مدى مطابقة قيم التدفق المحسوبة للقيم الحقيقية المقاسة. تم استخدام طريقة أخرى لحساب التغذية تعتمد فقط على معلومات التدفق في الأودية وهي طريقة إزاحة منحنى الانحسار. تظهر مقارنة قيم التغذية من الطريقتين اختلافا كبيرا في القيم المحسوبة نظرا للاختلاف المبدئي بين الطريقتين في تعريف التغذية. سيتم اعتماد نتائج الطريقة الأولى نظرا لأنها موزعة جغرافيا، ونظرا لأن النموذج المفاهيمي لهذه الطريقة يمثل الواقع الفيزيائي بصورة أفضل.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

How this classification was reachedexpand

Full frame machine prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.001
Version: metacan-v3-hybrid-931329e0061cValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Simulation or modeling · Consensus signal: none
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.015
Threshold uncertainty score0.108

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0000.001
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0020.003
Science and technology studies0.0010.000
Scholarly communication0.0010.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0010.000

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.056
GPT teacher head0.321
Teacher spread0.265 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designSimulation or modeling
Domainnot available
GenreEmpirical

How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".

Quick stats

Citations1
Published2017
Admission routes2
Has abstractyes

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