Developing nitrate-nitrogen transport models using remotely-sensed geospatial data of soil moisture profiles and wet depositions

Preetha, Pooja P.; Al-Hamdan, Ashraf Z.

doi:10.1080/10934529.2020.1724503

Cited by 11 publications

(3 citation statements)

References 68 publications

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“…For example, Liu et al [11] observed that nitrate-N concentration in the ground water in northern China was poorly related to land use type on the ground, although the region was a typically high nitrate yielding one. Recent developments that take into account the complexities of watersheds, and the impacts of factors such as denitrification, utilise modern remote sensing and modelling techniques to provide valuable insights into groundwater pollution with nitrate-N [26].…”

Section: Leaching Of Fertilizer N From the Soil-plant System And Its mentioning

confidence: 99%

Fertilizers and nitrate pollution of surface and ground water: an increasingly pervasive global problem

2021

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Nitrate pollution of ground and surface water bodies all over the world is generally linked with continually increasing global fertilizer nitrogen (N) use. But after 1990, with more fertilizer N consumption in developing countries especially in East and South Asia than in the industrialized nations in North America and Europe, nitrate pollution of freshwaters is now increasingly becoming a pervasive global problem. In this review it has been attempted to review the research information generated during the last two decades from all over the world on different aspects of nitrate pollution of natural water bodies. It is now evident that not more than 50% of the fertilizer N is directly used by the crops to which it is applied. While a small portion may directly leach down and may reach ground and surface water bodies, a large proportion ends up in the soil organic N pool from where N is mineralized and is taken up by plants and/or lost via leaching during several decades. Present trends of nitrate pollution of freshwaters, therefore, reflect legacies of current and past applications of fertilizers and manures. Tools such as simulation models and the natural variation in the stable isotopes of N and oxygen are now being extensively used to study the contribution of fertilizers and other sources to nitrate enrichment of freshwaters. Impacts of agricultural stewardship measures are being assessed and nitrate enrichment of water bodies is being managed using modern digital models and frameworks. Improved water and fertilizer management in agroecosystems can reduce the contribution of fertilizers to nitrate pollution of water bodies but a host of factors determine the magnitude. Future research needs are also considered.

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Section: Leaching Of Fertilizer N From the Soil-plant System And Its mentioning

confidence: 99%

Fertilizers and nitrate pollution of surface and ground water: an increasingly pervasive global problem

2021

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“…Shallow groundwater -the upper layer of the lower qh1 Holocene is often polluted due to the leaching process of pollutants matter from surface water. The groundwater level increases in heavy rain conditions leading to contact with the upper soil layers to contribute to increasing pollution compared to other layers (Preetha et al, 2020). Some chemicals from irrigation water including NO 3 can through the soil and potentially contaminate groundwater.…”

Section: Introductionmentioning

confidence: 99%

Potential of Irrigation and Biochar on Reduction Methane Emission and Leaching Nitrate into Groundwater

Dinh,

Nguyen,

Nguyen

et al. 2024

J. Ecol. Eng.

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Agricultural by-products such as rice husks are very popular in Vietnam, which are often burned in the fields, causing an increase in dust smoke and greenhouse gas (GHG) emissions. To study the effects of different irrigation methods, quality of irrigation water and additive biochar from rice husk (BFRH) on leaching nitrate from paddy fields into shallow groundwater and methane (CH 4 ) emissions, we investigated a two-season experiment (2021-2023) under two irrigation methods: water-saving irrigation and flood irrigation with 120 kg N/ha. The results illustrated that seasonal CH 4 emissions and leaching nitrate were affected by irrigation practices and significantly correlated with the quality of irrigation and the amount of BFRH added. To compare of control, the flood irrigation water increased the leaching of GHG and NO 3 into shallow groundwater from 27.3-32.4% and 16.4-31.25%, respectively. Meanwhile, the saving water irrigation reduced CH 4 and leaching of NO 3 into shallow groundwater from 13.3-17.8% and 15.63-18.9%, respectively. Applying biochar with controlling fertilizer reduces CH 4 and NO 3 content in surface field water, contributing to the decreased leaching of NO 3 into groundwater. Reducing 20% fertilizer rate of N (96 kg N/ha) with application biochar of 5% without a change in yield reduces NO 3 content into shallow groundwater from 13.7-14.3%. We conclude that water-saving irrigation combined with biochar from rice husk incorporation simultaneously mitigates CH 4 emissions, improves yield, and reduces leaching nitrate into groundwater, making it a suitable environment-friendly nitrogen management practice for sustainable farming in northern Vietnam.

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“…It leads to long-term changes in the environment and results in reduced water quality, which ultimately affects environmental and human health. Soil erosion decreases soil fertility as well as agricultural productivity by land degradation, increased flooding and landslides, and surface and ground contaminant diffusion by the inflow of sediments to rivers [1][2][3][4][5][6][7]. In the United States, numerous studies have reported that soil erosion is a significant environmental hazard owing to its critical ecologic effects [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

A Union of Dynamic Hydrological Modeling and Satellite Remotely-Sensed Data for Spatiotemporal Assessment of Sediment Yields

Preetha

Al-Hamdan

2022

Remote Sensing

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(1) The existing frameworks for water quality modeling overlook the connection between multiple dynamic factors affecting spatiotemporal sediment yields (SY). This study aimed to implement satellite remotely sensed data and hydrological modeling to dynamically assess the multiple factors within basin-scale hydrologic models for a realistic spatiotemporal prediction of SY in watersheds. (2) A connective algorithm was developed to incorporate dynamic models of the crop and cover management factor (C-factor) and the soil erodibility factor (K-factor) into the Soil and Water Assessment Tool (SWAT) with the aid of the Python programming language and Geographic Information Systems (GIS). The algorithm predicted the annual SY in each hydrologic response unit (HRU) of similar land cover, soil, and slope characteristics in watersheds between 2002 and 2013. (3) The modeled SY closely matched the observed SY using the connective algorithm with the inclusion of the two dynamic factors of K and C (predicted R2 (PR2): 0.60–0.70, R2: 0.70–0.80, Nash Sutcliffe efficiency (NS): 0.65–0.75). The findings of the study highlight the necessity of excellent spatial and temporal data in real-time hydrological modeling of catchments.

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Developing nitrate-nitrogen transport models using remotely-sensed geospatial data of soil moisture profiles and wet depositions

Cited by 11 publications

References 68 publications

Fertilizers and nitrate pollution of surface and ground water: an increasingly pervasive global problem

Fertilizers and nitrate pollution of surface and ground water: an increasingly pervasive global problem

Potential of Irrigation and Biochar on Reduction Methane Emission and Leaching Nitrate into Groundwater

A Union of Dynamic Hydrological Modeling and Satellite Remotely-Sensed Data for Spatiotemporal Assessment of Sediment Yields

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