Effects of reclaimed water discharge in the Maneadero coastal aquifer, Baja California, Mexico

Gilabert-Alarcón, Christian; Daesslé, Luis Walter; Salgado-Méndez, Saúl O.; Pérez-Flores, M. A.; Knöller, Kay; Kretzschmar, Thomas; Stumpp, Christine

doi:10.1016/j.apgeochem.2018.03.006

Cited by 28 publications

(12 citation statements)

References 82 publications

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“…Nonetheless, water in most coastal and urban aquifers already fails to comply with this drinking water regulation. For example, water in the Maneadero aquifer deteriorated through urban wastewater infiltration and the leaching of garbage and urban solid waste prior to reclaimed water use [15]. The soil-aquifer treatment method [4] would represent a feasible alternative to further improve the RW quality and prevent potential risks to public health and the environment.…”

Section: Coherent Water Quality Requirementsmentioning

confidence: 99%

“…The soil-aquifer treatment method [4] would represent a feasible alternative to further improve the RW quality and prevent potential risks to public health and the environment. In Maneadero, Gilabert-Alarcón et al [15] reported the limited soil capacity to retain important elements derived from RW such as sodium, boron and bromide, which were found to remain in groundwater and, eventually, could affect the environment, public health and crop productivity. Infiltration during irrigation with RW represents a significant component in the water balance and water quality.…”

Section: Coherent Water Quality Requirementsmentioning

confidence: 99%

“…2 coastal aquifer, which is the main water supply for the cities of Ensenada and Maneadero and on which the Valley agriculture depends. According to official data, the aquifer over-abstraction is estimated at 5.4 million cubic meters per year (Mm 3 y −1 ) [14] and is significantly affected by seawater intrusion and anthropogenic pollution [15]. In consequence, salinity has caused severe deterioration of groundwater quality for agriculture and domestic water supply, resulting in several wells being abandoned in the last 10 years.…”

Section: Introductionmentioning

confidence: 99%

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Regulatory Challenges for the Use of Reclaimed Water in Mexico: A Case Study in Baja California

Gilabert-Alarcón

Salgado-Méndez

Daesslé

et al. 2018

Water

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In Mexico, water planning is based on the National Water Law, the core of which is Integrated Water Resources Management (IWRM). The municipality provides wastewater treatment and reuse, and an integrated approach is mandatory for these processes. However, a traditional (non-integrated) management regime has prevailed in water legislation, resulting in pollution and the inefficient use of water. The objectives of this research were to analyze the Mexican legal framework and international guidelines in the use of reclaimed water for agricultural irrigation and environmental discharges, and to evaluate challenges facing reclaimed water in the Maneadero Valley, Baja California, as a case study. Results show that wastewater reuse was implemented in the absence of integrative planning and assessment of the potential impacts on the environment and public health. In addition, gaps between decisions linked to the legal attributes of the relevant institutions were identified. Defined roles across the three levels of authority, transparent and congruent funding, coherent water-quality requirements and the strengthening of stakeholder participation are needed to adopt integrated water resource management for reclaimed water use. The alignment of common goals on public health, environmental protection and agricultural development between authorities and the different sectors is crucial to bridge these challenges.

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Section: Coherent Water Quality Requirementsmentioning

confidence: 99%

Section: Coherent Water Quality Requirementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Regulatory Challenges for the Use of Reclaimed Water in Mexico: A Case Study in Baja California

Gilabert-Alarcón

Salgado-Méndez

Daesslé

et al. 2018

Water

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“…Ninety percent of the land in Maneadero Valley is oriented to agricultural activities; its water demand is supplied by the aquifer and recently has incorporated treated wastewater [24]. The Maneadero aquifer presents a condition of intensive extraction and salinization caused by marine intrusion, with total dissolved solids (TDS) concentrations between 1.1 and 26.9 g L −1 [22][23][24][25], by far exceeding the maximum permissible limit of 1 g L −1 (Official Mexican Standard NOM-127-SSA1-1994). Nearly 300 wells are active, and the allocated volume of water is 39.06 hm 3 , with an annual recharge of 33.7 hm 3 , resulting in an annual deficit of 5.37 hm 3 [17].…”

Section: Study Areamentioning

confidence: 99%

Public Participation for Integrated Groundwater Management: The Case of Maneadero Valley, Baja California, Mexico

Villada-Canela

Muñoz-Pizza

García-Searcy

et al. 2021

Water

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There is a controversy in groundwater management: some people argue that public participation has decreased efficiency in decision-making, while others believe this process is not executed effectively. Questions about whether public participation results from the context involving influential people, the rules, or the way participation mechanisms were designed need examination. In this study, opportunities, barriers, and challenges of public participation were analyzed in the management of a coastal aquifer affected by marine intrusion in the Maneadero Valley, México. Mixed methods were implemented, involving 28 interviews with key actors and 50 surveys conducted during 2014 and 2017 with groundwater users. Results show that public participation is mainly determined by power differences, lack of continuity in the participatory processes, and the design of the participation mechanisms. State actors have greater decision-making power in integrated groundwater management. In contrast, groundwater users have limited participation in the process of making proposals, and their participation is generally passive. There are limitations to broad, informed, and responsible public participation: examples of these limitations include different levels of information, inappropriate institutional arrangements, failure to disseminate scientific information, lack of spaces to exercise public participation, and absence of political will. Hence, to improve Maneadero aquifer management, it is necessary to decentralize decision-making, integrate technical and non-technical knowledge, generate scientific evidence about water availability, and give a prominent role to stakeholders and users from the initial stages. In addition, internalization and water culture are required. These results can help to guide integrated groundwater management in other arid regions.

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“…The treatment of fusarium wilt, and other diseases and pests, requires the intensive application of agrochemicals like fungicides, insecticides, and foliar fertilizers [18]. Adverse effects from exposure to these compounds have already been demonstrated on the health of laborers [19], and in the quality of urban and agricultural water sources, through contamination [20,21]. These environmental and human costs, together with the shift of consumer preferences to sustainable agricultural practices [15], suggest the need for the development of more sustainable crop management alternatives.…”

Section: Introductionmentioning

confidence: 99%

Rhizobacteria Associated with a Native Solanaceae Promote Plant Growth and Decrease the Effects of Fusariumoxysporum in Tomato

2021

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Plant growth-promoting rhizobacteria are often utilized to improve crop health and productivity. Nevertheless, their positive effects can be hindered if they fail to withstand the environmental and ecological conditions of the regions where they are applied. An alternative approach to circumvent this problem is a tailored selection of bacteria for specific agricultural systems. In this work, we evaluated the plant growth promoting and pathogen inhibition activity of rhizobacteria obtained from the rhizosphere of Mariola (Solanum hindsianum), an endemic shrub from Baja California. Eight strains were capable of inhibiting Fusarium oxysporum in vitro, and thirteen strains were found to possess three or more plant-growth-promotion traits. Molecular identification of these strains, using 16 s rRNA partial sequences, identified them as belonging to the genera Arthrobacter, Bacillus, Paenibacillus, Pseudomonas, and Streptomyces. Finally, the effect of selected plant growth-promoting rhizobacteria (PGPR) strains on the growth and suppression of Fusarium wilt in tomato was evaluated. Results showed that these strains improved tomato plants growth under greenhouse conditions and reduced Fusarium wilt effects, as reflected in several variables such as length and weight of roots and stem. This work highlights the potential of native plants related to regionally important crops as a valuable source of beneficial bacteria.

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Effects of reclaimed water discharge in the Maneadero coastal aquifer, Baja California, Mexico

Cited by 28 publications

References 82 publications

Regulatory Challenges for the Use of Reclaimed Water in Mexico: A Case Study in Baja California

Regulatory Challenges for the Use of Reclaimed Water in Mexico: A Case Study in Baja California

Public Participation for Integrated Groundwater Management: The Case of Maneadero Valley, Baja California, Mexico

Rhizobacteria Associated with a Native Solanaceae Promote Plant Growth and Decrease the Effects of Fusariumoxysporum in Tomato

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