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Managed Aquifer Recharge with Marginal Water for Irrigation and Contaminant Attenuation.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Managed Aquifer Recharge with Marginal Water for Irrigation and Contaminant Attenuation./
作者:	Tang, Darrell W. S.
面頁冊數:	1 online resource (199 pages)
附註:	Source: Dissertations Abstracts International, Volume: 84-04, Section: B.
Contained By:	Dissertations Abstracts International84-04B.
標題:	Surface water. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29367351click for full text (PQDT)
ISBN:	9798352613115

Managed Aquifer Recharge with Marginal Water for Irrigation and Contaminant Attenuation.
Tang, Darrell W. S.

Managed Aquifer Recharge with Marginal Water for Irrigation and Contaminant Attenuation. - 1 online resource (199 pages)

Source: Dissertations Abstracts International, Volume: 84-04, Section: B.

Thesis (Ph.D.)--Wageningen University and Research, 2022.

Includes bibliographical references

Water resource scarcity, food security, and environmental pollution are three major issues, that threaten the sustainability of the natural environment and the lives and livelihoods of people around the globe, especially the marginalized and those who live in developing regions. Despite increasing efforts by scientists and policymakers to resolve these issues, there is still no end in sight, partly because of the lack of conviction, and partly due to inability. With currently available technology, it is often necessary to make sacrifices regarding one of the issues in order to effect an improvement in another. For example, attempts to tackle food shortages by increasing agricultural production would necessitate the use of more water resources for irrigation, and agricultural chemicals for soil fertilization, which in turn may exacerbate water scarcity and environmental pollution, resulting in no net benefit to sustainability. It is therefore imperative that methods to resolve such issues that have minimal trade-offs are developed.A new method of agricultural irrigation that has the potential to alleviate the above three issues is currently being tested at an experimental agricultural site in the Netherlands. This new method involves a newly developed subsurface irrigation and drainage system, irrigated with treated wastewater. To justify the use and development of this new method, Chapter 1 provides some historical context and a brief technical description of the method, along with an introductory discussion on its risks, benefits, shortcomings, and advantages in terms of environmental sustainability and crop contamination. Wastewater, including treated wastewater as no treatment technique can fully remove all impurities from wastewater without consuming large amounts of energy, contains residual biological and chemical substances. Some of these substances are known as contaminants of emerging concern (CECs), and are toxic or ecotoxic substances that are poorly understood in science due to reasons such as novelty or rarity. Hence, irrigating treated wastewater directly onto crops would contaminate the crops and the food supply. Treated wastewater irrigation with minimal risks of crop exposure may be accomplished by subsurface irrigation through pipes buried in the phreatic zone, which is situated some distance beneath the root zone. Part of the agricultural water demand may thus be fulfilled by applying treated wastewater to the soil through these pipes, upon which they raise the water table and increase the capillary flux towards the root zone, thereby irrigating the crops without directly exposing them to the CECs in the treated wastewater. CECs transported upwards by the capillary flux would be at least partly biodegraded by microorganisms present in the soil, in addition to being diluted by the groundwater, and being adsorbed to the soil matrix. Therefore, the water that reaches the root zone through capillary rise should contain a much lower concentration of CECs than the irrigation water. On days with large precipitation fluxes, or outside of the annual crop season, the same pipes can be used to drain the soil, and remove a portion of any CECs that may remain. Nevertheless, there remains a risk that crops will be exposed to CECs, or that the CECs may be transported in the subsurface to deeper groundwater aquifers, which is a source of freshwater, or surface water at the end of the phreatic aquifer, whereupon the CECs would pollute the aboveground environment.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798352613115Subjects--Topical Terms:

3685235
Surface water.
Index Terms--Genre/Form:

542853
Electronic books.

Managed Aquifer Recharge with Marginal Water for Irrigation and Contaminant Attenuation.
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245 1 0 $a Managed Aquifer Recharge with Marginal Water for Irrigation and Contaminant Attenuation.
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500 $a Source: Dissertations Abstracts International, Volume: 84-04, Section: B.
500 $a Advisor: van der Zee, S.E.A.T.M. van der; Leijnse, A.; Bartholomeus, R.P.
502 $a Thesis (Ph.D.)--Wageningen University and Research, 2022.
504 $a Includes bibliographical references
520 $a Water resource scarcity, food security, and environmental pollution are three major issues, that threaten the sustainability of the natural environment and the lives and livelihoods of people around the globe, especially the marginalized and those who live in developing regions. Despite increasing efforts by scientists and policymakers to resolve these issues, there is still no end in sight, partly because of the lack of conviction, and partly due to inability. With currently available technology, it is often necessary to make sacrifices regarding one of the issues in order to effect an improvement in another. For example, attempts to tackle food shortages by increasing agricultural production would necessitate the use of more water resources for irrigation, and agricultural chemicals for soil fertilization, which in turn may exacerbate water scarcity and environmental pollution, resulting in no net benefit to sustainability. It is therefore imperative that methods to resolve such issues that have minimal trade-offs are developed.A new method of agricultural irrigation that has the potential to alleviate the above three issues is currently being tested at an experimental agricultural site in the Netherlands. This new method involves a newly developed subsurface irrigation and drainage system, irrigated with treated wastewater. To justify the use and development of this new method, Chapter 1 provides some historical context and a brief technical description of the method, along with an introductory discussion on its risks, benefits, shortcomings, and advantages in terms of environmental sustainability and crop contamination. Wastewater, including treated wastewater as no treatment technique can fully remove all impurities from wastewater without consuming large amounts of energy, contains residual biological and chemical substances. Some of these substances are known as contaminants of emerging concern (CECs), and are toxic or ecotoxic substances that are poorly understood in science due to reasons such as novelty or rarity. Hence, irrigating treated wastewater directly onto crops would contaminate the crops and the food supply. Treated wastewater irrigation with minimal risks of crop exposure may be accomplished by subsurface irrigation through pipes buried in the phreatic zone, which is situated some distance beneath the root zone. Part of the agricultural water demand may thus be fulfilled by applying treated wastewater to the soil through these pipes, upon which they raise the water table and increase the capillary flux towards the root zone, thereby irrigating the crops without directly exposing them to the CECs in the treated wastewater. CECs transported upwards by the capillary flux would be at least partly biodegraded by microorganisms present in the soil, in addition to being diluted by the groundwater, and being adsorbed to the soil matrix. Therefore, the water that reaches the root zone through capillary rise should contain a much lower concentration of CECs than the irrigation water. On days with large precipitation fluxes, or outside of the annual crop season, the same pipes can be used to drain the soil, and remove a portion of any CECs that may remain. Nevertheless, there remains a risk that crops will be exposed to CECs, or that the CECs may be transported in the subsurface to deeper groundwater aquifers, which is a source of freshwater, or surface water at the end of the phreatic aquifer, whereupon the CECs would pollute the aboveground environment.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2023
538 $a Mode of access: World Wide Web
650 4 $a Surface water. $3 3685235
650 4 $a Flow velocity. $3 3564851
650 4 $a Water treatment. $3 3683746
650 4 $a Drainage. $3 548581
650 4 $a Adaptation. $3 3562958
650 4 $a Crops. $3 672677
650 4 $a Biomass. $3 1013462
650 4 $a Irrigation. $3 778786
650 4 $a Freshwater resources. $3 3687616
650 4 $a Effluents. $3 3559973
650 4 $a Farmworkers. $3 3681255
650 4 $a Aquifers. $3 551140
650 4 $a Agriculture. $3 518588
650 4 $a Sensitivity analysis. $3 3560752
650 4 $a Groundwater. $3 566494
650 4 $a Regions. $3 3560048
650 4 $a Public health. $3 534748
650 4 $a Biodegradation. $3 705930
650 4 $a Physical properties. $3 3564184
650 4 $a Microorganisms. $3 666946
650 4 $a Geometry. $3 517251
650 4 $a Hydraulics. $3 669758
650 4 $a Agronomy. $3 2122783
650 4 $a Aquatic sciences. $3 3174300
650 4 $a Environmental engineering. $3 548583
650 4 $a Fluid mechanics. $3 528155
650 4 $a Hydraulic engineering. $3 613609
650 4 $a Hydrologic sciences. $3 3168407
650 4 $a Limnology. $3 545788
650 4 $a Mathematics. $3 515831
650 4 $a Mechanics. $3 525881
650 4 $a Microbiology. $3 536250
650 4 $a Physics. $3 516296
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773 0 $t Dissertations Abstracts International $g 84-04B.
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