NDLI: Dynamic regression modeling of daily nitrate-nitrogen concentrations in a large agricultural watershed

Content Provider	Springer Nature Link
Author	Feng, Zhujing Schilling, Keith E. Chan, Kung Sik
Copyright Year	2012
Abstract	Nitrate-nitrogen concentrations in rivers represent challenges for water supplies that use surface water sources. Nitrate concentrations are often modeled using time-series approaches, but previous efforts have typically relied on monthly time steps. In this study, we developed a dynamic regression model of daily nitrate concentrations in the Raccoon River, Iowa, that incorporated contemporaneous and lags of precipitation and discharge occurring at several locations around the basin. Results suggested that 95 % of the variation in daily nitrate concentrations measured at the outlet of a large agricultural watershed can be explained by time-series patterns of precipitation and discharge occurring in the basin. Discharge was found to be a more important regression variable than precipitation in our model but both regression parameters were strongly correlated with nitrate concentrations. The time-series model was consistent with known patterns of nitrate behavior in the watershed, successfully identifying contemporaneous dilution mechanisms from higher relief and urban areas of the basin while incorporating the delayed contribution of nitrate from tile-drained regions in a lagged response. The first difference of the model errors were modeled as an AR(16) process and suggest that daily nitrate concentration changes remain temporally correlated for more than 2 weeks although temporal correlation was stronger in the first few days before tapering off. Consequently, daily nitrate concentrations are non-stationary, i.e. of strong memory. Using time-series models to reliably forecast daily nitrate concentrations in a river based on patterns of precipitation and discharge occurring in its basin may be of great interest to water suppliers.
Starting Page	4605
Ending Page	4617
Page Count	13
File Format	PDF
ISSN	01676369
Journal	Environmental Monitoring and Assessment
Volume Number	185
Issue Number	6
e-ISSN	15732959
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-10-05
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Nitrate nitrogen Time series ARIMA Watershed Regression Environmental Monitoring/Analysis Environmental Management Ecotoxicology Atmospheric Protection/Air Quality Control/Air Pollution Ecology
Content Type	Text
Resource Type	Article
Subject	Pollution Medicine Management, Monitoring, Policy and Law

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Transformation of nitrogen dioxide into ozone and prediction of ozone concentrations using multiple linear regression techniques

A Hydrologic Network Supporting Spatially Referenced Regression Modeling in the Chesapeake Bay Watershed

Pollution and variation of stream nitrate in a protected high-mountain watershed of Central Taiwan: evidence from nitrate concentration and nitrogen and oxygen isotope compositions

NITRATE CONCENTRATIONS IN RIYADH, SAUDI ARABIA DRINKING WATER SUPPLIES

Forecasting Daily Maximum Ozone Concentrations in the Athens Basin

Factors controlling the long-term temporal and spatial patterns of nitrate-nitrogen export in a dairy farming watershed

Use of continuous monitoring to assess stream nitrate flux and transformation patterns

Probability-based nitrate contamination map of groundwater in Kinmen

Dynamic Hydrologic Simulation of the Bear Brook Watershed in Maine (BBWM)

Dynamic regression modeling of daily nitrate-nitrogen concentrations in a large agricultural watershed

Similar Documents

Transformation of nitrogen dioxide into ozone and prediction of ozone concentrations using multiple linear regression techniques

A Hydrologic Network Supporting Spatially Referenced Regression Modeling in the Chesapeake Bay Watershed

Pollution and variation of stream nitrate in a protected high-mountain watershed of Central Taiwan: evidence from nitrate concentration and nitrogen and oxygen isotope compositions

NITRATE CONCENTRATIONS IN RIYADH, SAUDI ARABIA DRINKING WATER SUPPLIES

Forecasting Daily Maximum Ozone Concentrations in the Athens Basin

Factors controlling the long-term temporal and spatial patterns of nitrate-nitrogen export in a dairy farming watershed

Use of continuous monitoring to assess stream nitrate flux and transformation patterns

Probability-based nitrate contamination map of groundwater in Kinmen

Dynamic Hydrologic Simulation of the Bear Brook Watershed in Maine (BBWM)

Dynamic regression modeling of daily nitrate-nitrogen concentrations in a large agricultural watershed