The effectiveness on several fruits by the application of alternative methods against fungi is summarized in the present chapter. Several investigations have reported the efficacy of these technologies for controlling fungal infections. Currently, high post-harvest loses have been reported due to several factors such as inefficient management, lack of training for farmers, and problems with appropriate conditions for storage of fruits and vegetables. Even now, in many countries, post-harvest disease control is led by the application of chemical fungicides.
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A Benefit-cost Analysis Of Treated Wastewater Reuse For Irrigation In Tubas
The West Bank, Palestine suffers from water scarcity due to the high population growth rate, the political situation that dictates the utilization and development of the water resources and the arid and semiarid climate conditions. Reuse of treated wastewater can be a source of water for the
irrigation of agricultural crops and thus this will lessen the stress on the water resources, increase the agricultural productivity and prevent the pollution of
the soil and groundwater. This work investigated the feasibility of reusing treated wastewater for irrigation in the Tubas area. Thereafter, a benefit-cost analysis was carried out to estimate the cost of the reuse of the treated wastewater in Tubas area. The study considered five options for wastewater treatment in Tubas area: construction of a treatment plant for the wastewater originating from the north of Tubas, south of Tubas, north of Tubas and Tayaser village, all of Tubas, and all of Tubas and Tayaser village, respectively. The study analyzed three systems for secondary wastewater treatment: activated sludge (AS), trickling filter (TF) and aerated lagoons (AL).
A Benefit-cost Analysis Of Treated Wastewater Reuse For Irrigation In Tubas
The West Bank, Palestine suffers from water scarcity due to the high population growth rate, the political situation that dictates the utilization and development of the water resources and the arid and semiarid climate conditions. Reuse of treated wastewater can be a source of water for the
irrigation of agricultural crops and thus this will lessen the stress on the water resources, increase the agricultural productivity and prevent the pollution of
the soil and groundwater. This work investigated the feasibility of reusing treated wastewater for irrigation in the Tubas area. Thereafter, a benefit-cost analysis was carried out to estimate the cost of the reuse of the treated wastewater in Tubas area. The study considered five options for wastewater treatment in Tubas area: construction of a treatment plant for the wastewater originating from the north of Tubas, south of Tubas, north of Tubas and Tayaser village, all of Tubas, and all of Tubas and Tayaser village, respectively. The study analyzed three systems for secondary wastewater treatment: activated sludge (AS), trickling filter (TF) and aerated lagoons (AL).
Watering Floodplain Wetlands in the Murray–Darling Basin to Benefit Native Fish A Discussion with Managers
This report describes the content and outcomes of a workshop entitled ‘Watering Floodplain Wetlands of the Murray–Darling Basin for Fish: A Discussion with Managers’ held on 5 March 2008 at Wonga Wetlands in Albury (NSW). The workshop was part of a four-year, National Water Commission funded project aimed at optimizing wetland environmental watering protocols to maximize benefits to native fish populations.
Watering Floodplain Wetlands in the Murray–Darling Basin to Benefit Native Fish A Discussion with Managers
This report describes the content and outcomes of a workshop entitled ‘Watering Floodplain Wetlands of the Murray–Darling Basin for Fish: A Discussion with Managers’ held on 5 March 2008 at Wonga Wetlands in Albury (NSW). The workshop was part of a four-year, National Water Commission funded project aimed at optimizing wetland environmental watering protocols to maximize benefits to native fish populations.
Safe Use of Wastewater in Agriculture Good Practice Examples
Abstract
Managed aquifer recharge (MAR) systems such as riverbank iltration and soil-aquifer treatment all involve the use of natural subsurface systems to improve the quality of recharged water (i.e., surface water, storm water, reclaimed water) before reuse (e.g. planned potable reuse). During MAR, water is either iniltrated via basins, subsurface injected or abstracted from wells adjacent to rivers. MAR systems represent an attractive option for augmenting and improving groundwater quality as well as for environmental management purposes. However, reuse systems designed for applications that involve human contact should include redundant barriers for pathogens that cause waterborne diseases. This case covers key aspects of a case study on virus removal at three full-scale MAR systems located in different regions of the United States (Arizona, Colorado, and California). MAR projects may be economically viable for developing countries; however, sustainable management is relevant to successfully maintain the attributes necessary for potable and non-potable water reuse.
Keywords: management, aquifer, recharge, removal, viruses
Safe Use of Wastewater in Agriculture Good Practice Examples
Abstract
Managed aquifer recharge (MAR) systems such as riverbank iltration and soil-aquifer treatment all involve the use of natural subsurface systems to improve the quality of recharged water (i.e., surface water, storm water, reclaimed water) before reuse (e.g. planned potable reuse). During MAR, water is either iniltrated via basins, subsurface injected or abstracted from wells adjacent to rivers. MAR systems represent an attractive option for augmenting and improving groundwater quality as well as for environmental management purposes. However, reuse systems designed for applications that involve human contact should include redundant barriers for pathogens that cause waterborne diseases. This case covers key aspects of a case study on virus removal at three full-scale MAR systems located in different regions of the United States (Arizona, Colorado, and California). MAR projects may be economically viable for developing countries; however, sustainable management is relevant to successfully maintain the attributes necessary for potable and non-potable water reuse.
Keywords: management, aquifer, recharge, removal, viruses
Water and Agriculture: Towards Sustainable Solutions
The main pressures from agriculture are linked to diffuse pollution from nutrients and chemicals, water abstraction and hydromorphological changes. Often several pressures act at the same time, potentially increasing the range of ecological impacts. According to information reported under the WFD, around one third of surface water bodies fail to achieve good status because of one or several of these pressures.
Water and Agriculture: Towards Sustainable Solutions
The main pressures from agriculture are linked to diffuse pollution from nutrients and chemicals, water abstraction and hydromorphological changes. Often several pressures act at the same time, potentially increasing the range of ecological impacts. According to information reported under the WFD, around one third of surface water bodies fail to achieve good status because of one or several of these pressures.
Wastewater Use in Agriculture
Introduction
With increasing global population, the gap between the supply and demand for water is widening and is reaching such alarming levels that in some parts of the world it is posing a threat to human existence. Scientists around the globe are working on new ways of conserving water. It is an opportune time, to refocus on one of the ways to recycle water—through the reuse of urban wastewater, for irrigation and other purposes. This could release clean water for use in other sectors that need fresh water and provide water to sectors that can utilize wastewater e.g., for irrigation and other ecosystem services. In general, wastewater comprises liquid wastes generated by households, industry, commercial sources, as a result of daily usage, production, and consumption activities. Municipal treatment facilities are designed to treat raw wastewater to produce a liquid effluent of suitable quality that can be disposed to the natural surface waters with minimum impact on human health or the environment. The disposal of wastewater is a major problem faced by municipalities, particularly in the case of large metropolitan areas, with limited space for land[1]based treatment and disposal. On the other hand, wastewater is also a resource that can be applied for productive uses since wastewater contains nutrients that have the potential for use in agriculture, aquaculture, and other activities. In both developed and developing countries, the most prevalent practice is the application of municipal wastewater (both treated and untreated) to land. In developed countries where environmental standards are applied, much of the wastewater is treated prior to use for irrigation of fodder, fiber, and seed crops and, to a limited extent, for the irrigation of orchards, vineyards, and other crops. Other important uses of wastewater include, recharge of groundwater, landscaping (golf courses, freeways, playgrounds, schoolyards, and parks), industry, construction, dust control, wildlife habitat improvement and aquaculture. In developing countries, though standards are set, these are not always strictly adhered to. Wastewater, in its untreated form, is widely used for agriculture and aquaculture and has been the practice for centuries in countries such as China, India and Mexico. Thus, wastewater can be considered as both a resource and a problem. Wastewater and its nutrient content can be used extensively for irrigation and other ecosystem services. Its reuse can deliver positive benefits to the farming community, society, and municipalities. However, wastewater reuse also exacts negative externality effects on humans and ecological systems, which need to be identified and assessed. Before one can endorse wastewater irrigation as a means of increasing water supply for agriculture, a thorough analysis must be undertaken from an economic perspective as well. In this regard the comprehensive costs and benefits of such wastewater reuse should be evaluated. Conventional cost benefit analysis quite often fails to quantify and monetize externalities associated with wastewater reuse. Hence, environmental valuation techniques and other related tools should be employed to guide decision-making. Moreover, the economic effects of wastewater irrigation need to be evaluated not only from the social, economic, and ecological standpoint, but also from the sustainable development perspective. Pakistan is a case which illustrates this problem. Both treated and untreated municipal wastewater in the vicinity of large cities like Faisalabad is used for vegetable production. But, how safe is this practice? How does one tradeoff between the obvious benefits of this use and the costs associated with it?
Wastewater Use in Agriculture
Introduction
With increasing global population, the gap between the supply and demand for water is widening and is reaching such alarming levels that in some parts of the world it is posing a threat to human existence. Scientists around the globe are working on new ways of conserving water. It is an opportune time, to refocus on one of the ways to recycle water—through the reuse of urban wastewater, for irrigation and other purposes. This could release clean water for use in other sectors that need fresh water and provide water to sectors that can utilize wastewater e.g., for irrigation and other ecosystem services. In general, wastewater comprises liquid wastes generated by households, industry, commercial sources, as a result of daily usage, production, and consumption activities. Municipal treatment facilities are designed to treat raw wastewater to produce a liquid effluent of suitable quality that can be disposed to the natural surface waters with minimum impact on human health or the environment. The disposal of wastewater is a major problem faced by municipalities, particularly in the case of large metropolitan areas, with limited space for land[1]based treatment and disposal. On the other hand, wastewater is also a resource that can be applied for productive uses since wastewater contains nutrients that have the potential for use in agriculture, aquaculture, and other activities. In both developed and developing countries, the most prevalent practice is the application of municipal wastewater (both treated and untreated) to land. In developed countries where environmental standards are applied, much of the wastewater is treated prior to use for irrigation of fodder, fiber, and seed crops and, to a limited extent, for the irrigation of orchards, vineyards, and other crops. Other important uses of wastewater include, recharge of groundwater, landscaping (golf courses, freeways, playgrounds, schoolyards, and parks), industry, construction, dust control, wildlife habitat improvement and aquaculture. In developing countries, though standards are set, these are not always strictly adhered to. Wastewater, in its untreated form, is widely used for agriculture and aquaculture and has been the practice for centuries in countries such as China, India and Mexico. Thus, wastewater can be considered as both a resource and a problem. Wastewater and its nutrient content can be used extensively for irrigation and other ecosystem services. Its reuse can deliver positive benefits to the farming community, society, and municipalities. However, wastewater reuse also exacts negative externality effects on humans and ecological systems, which need to be identified and assessed. Before one can endorse wastewater irrigation as a means of increasing water supply for agriculture, a thorough analysis must be undertaken from an economic perspective as well. In this regard the comprehensive costs and benefits of such wastewater reuse should be evaluated. Conventional cost benefit analysis quite often fails to quantify and monetize externalities associated with wastewater reuse. Hence, environmental valuation techniques and other related tools should be employed to guide decision-making. Moreover, the economic effects of wastewater irrigation need to be evaluated not only from the social, economic, and ecological standpoint, but also from the sustainable development perspective. Pakistan is a case which illustrates this problem. Both treated and untreated municipal wastewater in the vicinity of large cities like Faisalabad is used for vegetable production. But, how safe is this practice? How does one tradeoff between the obvious benefits of this use and the costs associated with it?
Irrigation Engineering
Purpose of Irrigation
Some of the main purposes of irrigation are enlisted below:
1. To supply essential moisture for plant growth
2. Transportation of fertilizers (Fertigation)
3. To leach or dilute salts in the soil
4. To help in field preparation, dust control, etc.
5. Other benefits of irrigation include cooling the soil and atmosphere to create a more favorable environment for crop growth and frost control.
Irrigation Engineering
Purpose of Irrigation
Some of the main purposes of irrigation are enlisted below:
1. To supply essential moisture for plant growth
2. Transportation of fertilizers (Fertigation)
3. To leach or dilute salts in the soil
4. To help in field preparation, dust control, etc.
5. Other benefits of irrigation include cooling the soil and atmosphere to create a more favorable environment for crop growth and frost control.
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