nitrate and chloride concentrations in groundwater beneath a portion of the trinity group outcrop zone, texas

نویسندگان

p.e. hudak

چکیده

using a geographic information system and statistics, we evaluated spatial distributions ofnitrate and chloride concentrations in groundwater in an area of north-central texas with agricultural activity,in addition to oil and natural gas exploration and production. data were compiled from 40 water wells sampledin 2007. nitrate concentrations in three wells exceeded the maximum contaminant level (44 mg/l) for drinkingwater. the highest nitrate concentration was 149 mg/l, and concentrations were generally higher in shallowerwells. chloride concentrations exceeded the 250 mg/l secondary drinking water standard in two wells, with nosignificant association between chloride concentration and well depth. results of this study suggest localizedhuman impacts, especially for nitrate, and identify areas warranting future monitoring.

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

nitrate and chloride concentrations in groundwater beneath a portion of the trinity group outcrop zone, texas

using a geographic information system and statistics, we evaluated spatial distributions ofnitrate and chloride concentrations in groundwater in an area of north-central texas with agricultural activity,in addition to oil and natural gas exploration and production. data were compiled from 40 water wells sampledin 2007. nitrate concentrations in three wells exceeded the maximum contaminant level...

متن کامل

Spatial Inference of Nitrate Concentrations in Groundwater

We develop a method for multi-scale estimation of pollutant concentrations, based on a nonparametric spatial statistical model. We apply this method to estimate nitrate concentrations in groundwater over the mid-Atlantic states, using measurements gathered during a period of ten years. A map of the fine-scale estimated nitrate concentration is obtained, as well as maps of the estimated county-l...

متن کامل

Nebraska's groundwater legacy: Nitrate contamination beneath irrigated cropland

A 31 year record of ∼44,000 nitrate analyses in ∼11,500 irrigation wells was utilized to depict the decadal expansion of groundwater nitrate contamination (N ≥ 10 mg/L) in the irrigated corn-growing areas of eastern and central Nebraska and analyze long-term nitrate concentration trends in 17 management areas (MAs) subject to N fertilizer and budgeting requirements. The 1.3 M contaminated hecta...

متن کامل

Geostatistical Methods for Mapping Groundwater Nitrate Concentrations

The purpose of this study is to evaluate the spatial changes of groundwater nitrate concentrations by using geostatistical methods based on data from 119 groundwater wells. Geostatistical methods have been used widely as a convenient tool to make decision on the management of behavior of hydrochemical parameters in groundwater. To evaluate the spatial changes nitrate concentrations in groundwat...

متن کامل

a study of the fifth child and ben in the world by doris lessing in the light of julia kristevas psychoanalytic concepts

این مطالعه به بررسی عوامل روانشناختی کریستوادردو رمان دوربس لسینگ،فرزندبنجم و بن دردنیای واقعی می بردازد.موفقیت یا شکست کاراکترهادر تکمیل شکست تتیزی یه کمک بدر وهم از مهم ترین دغدغه محقق می باشد.به بررسی تحلیل روانشناختی تمامی کاراکترها خصوصا بن برداخته و به دنبال نشانه هایی از جامعه شیشه ای کریستوا می باشد.

15 صفحه اول

Regional analysis of groundwater nitrate concentrations and trends in Denmark

Regional analysis of groundwater nitrate concentrations and trends in Denmark in regard to agricultural influence B. Hansen, T. Dalgaard, L. Thorling, B. Sørensen, and M. Erlandsen Department of Groundwater and Quaternary Geology Mapping, Geological Survey of Denmark and Greenland – GEUS, Lyseng Allé 1, 8270 Højbjerg, Denmark Department of Agroecology, Aarhus University, Denmark Department of H...

متن کامل

منابع من

با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید


عنوان ژورنال:
international journal of environmental research

ناشر: university of tehran

ISSN 1735-6865

دوره 6

شماره 3 2012

میزبانی شده توسط پلتفرم ابری doprax.com

copyright © 2015-2023