کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5751366 1619712 2017 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A catchment-scale method to simulating the impact of historical nitrate loading from agricultural land on the nitrate-concentration trends in the sandstone aquifers in the Eden Valley, UK
ترجمه فارسی عنوان
یک روش مقیاس آبشاری برای شبیه سازی بارگیری نیترات های تاریخی از زمین های کشاورزی بر روند نگرش غلظت نیترات در آبخوان های ماسه سنگ در ادم دره، انگلستان
کلمات کلیدی
زمان انحلال نیترات، منطقه غیر اشباع، منطقه اشباع شده، کیفیت آب زیرزمینی، مقیاس زباله،
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
چکیده انگلیسی


- An approach to modelling groundwater nitrate at the catchment scale is presented.
- It considers nitrate transport in glacial till and dual-porosity unsaturated zones.
- The impact of historical nitrate loading on groundwater quality is better understood.
- The modelled results are valuable for evaluating the nitrate legacy issue.
- The method is transferable and requires a modest parameterisation.

Nitrate water pollution, which is mainly caused by agricultural activities, remains an international problem. It can cause serious long-term environmental and human health issues due to nitrate time-lag in the groundwater system. However, the nitrate subsurface legacy issue has rarely been considered in environmental water management. We have developed a simple catchment-scale approach to investigate the impact of historical nitrate loading from agricultural land on the nitrate-concentration trends in sandstones, which represent major aquifers in the Eden Valley, UK. The model developed considers the spatio-temporal nitrate loading, low permeability superficial deposits, dual-porosity unsaturated zones, and nitrate dilution in aquifers. Monte Carlo simulations were undertaken to analyse parameter sensitivity and calibrate the model using observed datasets. Time series of annual average nitrate concentrations from 1925 to 2150 were generated for four aquifer zones in the study area. The results show that the nitrate concentrations in 'St Bees Sandstones', 'silicified Penrith Sandstones', and 'non-silicified Penrith Sandstones' keep rising or stay high before declining to stable levels, whilst that in 'interbedded Brockram Penrith Sandstones' will level off after a slight decrease. This study can help policymakers better understand local nitrate-legacy issues. It also provides a framework for informing the long-term impact and timescale of different scenarios introduced to deliver water-quality compliance. This model requires relatively modest parameterisation and is readily transferable to other areas.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Science of The Total Environment - Volume 579, 1 February 2017, Pages 133-148
نویسندگان
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