Fertigation to recover nitrate-polluted aquifer and improve a long time eutrophicated lake, Spain

Pérez-Martín, Miguel Ángel; Castillo, S.

doi:10.1016/j.scitotenv.2023.165020

Cited by 8 publications

(5 citation statements)

References 60 publications

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“…The condition of global lake wetlands is concerning, as they are currently experiencing severe degradation. This is evidenced by the eutrophication of lake water [61], the intensified degradation of aquatic vegetation [62], and the subsequent release of large amounts of carbon dioxide into the atmosphere. In the face of global climate change, it is crucial to restore and protect lake wetlands, improve their ecological quality, and enhance their carbon sequestration capacity, as this can be a practical approach to mitigating climate change.…”

Section: Discussionmentioning

confidence: 99%

Spatiotemporal Variations in the Carbon Sequestration Capacity of Plateau Lake Wetlands Regulated by Land Use Control under Policy Guidance

Chen,

Zhang,

Yang

et al. 2023

Land

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Lake wetlands play a crucial role in mitigating climate change. Human activities and climate change impact the carbon sequestration capacity of lake wetlands. However, this process is intricate. Clarifying the decisive factors that affect carbon sequestration is crucial for preserving, utilizing, and enhancing the carbon sequestration capacity of plateau lake wetlands. Here we analyzed the regulatory role of land use under policy guidance on the carbon sequestration capacity of the plateau lake wetland of Caohai (CHLW), SW China. The results show that: (1) The cumulative carbon sequestration varied significantly from 1990 to 2020, with the highest carbon sequestration of 15.80 × 105 t C in 1995 and the lowest of 3.18 × 105 t C in 2020, mainly originating from endogenous carbon sequestration within the plateau lake wetlands. (2) As of 2020, the carbon stock of CHLW was approximately 2.54 × 108 t C. (3) The carbon sequestration in CHLW experienced a dynamic change process of decrease-increase-decrease over 30 years, mainly influenced by land use changes under policy regulation, with human and natural factors accounting for 91% and 9%, respectively. (4) Under three simulated scenarios (Q1, Q2, and Q3), the ecological priority scenario exhibited positive regulation on the carbon sequestration of CHLW and the entire protected area in 2030 and 2060, with the highest increase in carbon sequestration. This scenario is consistent with the current conservation policy, indicating that the current protection policy for CHLW is scientifically reasonable. This research demonstrates how land use and climate changes impact carbon storage in wetlands, with consideration of policy guidance. It provides references for utilizing and conserving lake wetlands worldwide, ultimately achieving the dual goals of wetland conservation and carbon neutrality.

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Section: Discussionmentioning

confidence: 99%

Spatiotemporal Variations in the Carbon Sequestration Capacity of Plateau Lake Wetlands Regulated by Land Use Control under Policy Guidance

Chen,

Zhang,

Yang

et al. 2023

Land

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“…The model is a large-scale (medium/large RBs), conceptual, monthly, and spatially distributed (grid 1 × 1 km 2 ) water balance [57] and water quality model [56], for multi-decadal periods of 50-100 years. It is also used to assess the measures to recovery nitrate-polluted aquifers and their effect in environmental ecosystems [39].…”

Section: Methods and Modelsmentioning

confidence: 99%

“…During rainfall events, the nitrate concentration drop down to around 25-30 mgNO 3 /L and the total phosphorus concentration is around 0.5 or 1.0 mgP/L. The high amount of total phosphorus is possible to come from urban overflows or from the irrigation fields as phosphorus attached to the sediments, as is observed in other agricultural areas with a heavy historical application of phosphorus [39]. Occasional phosphorus loads during rainfall events can be 10-20 times higher than the regular loads.…”

Section: Study Areamentioning

confidence: 97%

Understanding Nutrient Loads from Catchment and Eutrophication in a Salt Lagoon: The Mar Menor Case

Pérez-Martín

2023

Water

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Eutrophication is a significant threat to aquatic ecosystems worldwide, and the Mar Menor hypersaline lagoon exemplifies a coastal lagoon at risk of algal blooms due to excessive nutrient loads, nitrogen, and phosphorus. These nutrients originate from various sources within the lagoon’s catchment area, including urban, agricultural, and livestock activities. Regular and occasional loads—during flood events—produce algal blooms that can significantly reduce the water oxygen content and cause massive mortalities, as observed in recent years. A daily algal growth model (Mmag) was developed to better understand the processes and determine key elements such as the phosphorus water–sediment interchange and deep water plants that effect the entire ecosystem and algal growth. The analysis developed can be applied in other wetlands around the world facing similar challenges. In the Mar Menor, both nitrogen and phosphorus have high relevance depending on the period of the year and the phosphorus legacy in the sediments. Floods are the main phosphorus input to the lagoon (80–90%), which goes to the sediment and is released after during the warm months in the following years. At the end of summer, phosphorus released from the sediment and the regular nitrate inputs to the lagoon increase the algal bloom risk. The good status of deep water plants, which reduces the phosphorus release in summer, is a key element to reduce the algal bloom risk. An integrated set of measures is required to reduce the mean chlorophyll to levels under 1 or 0.5 µgChla/L that can make the Mar Menor more robust and resilient.

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“…On the other hand, irrigation modernisation significantly reduces agricultural returns, with high concentrations of nitrate, phosphorus, and pesticides. This measure, accompanied by fertigation, can be the main measure applied to recover nitrate-polluted aquifers [43] and to reduce the eutrophication risk in rivers and lakes [44,45].…”

Section: Measures To Adapt Mediterranean River Basins To Climate Changementioning

confidence: 99%

Adapting Water Resources Management to Climate Change in Water-Stressed River Basins—Júcar River Basin Case

Estrela-Segrelles,

Pérez-Martín,

Wang

2024

Water

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Water scarcity will increase due to climate change, especially in basins that are currently highly stressed. The Mediterranean area is one of the most vulnerable areas in the world, with a predicted natural water resource reduction of 20% to 35% at the end of the century, due to temperature increases and a 10–20% precipitation reduction. Water scarcity indices, including gross abstraction, net abstraction, and consideration of environmental requirements, can be efficiently used to analyse the effects of climate change in water resource systems and determine the main measures to adapt these systems to climate change. Increasing the reclaimed water use, seawater desalination, irrigation efficiency, and interconnecting water resource systems are the main measures to adapt basins under water stress and reduce their vulnerability to climate change. In the Júcar River Basin District (JRBD), with a 20% reduction in natural water resources, the main measures are: increasing the reclaimed water use in agriculture from 20% to 50% (91 hm3/year to 230 hm3/year), increasing seawater desalination from 30 to 55 hm3/year, increasing irrigation efficiency from 54% to 80%, and finally, fully developing the current water interconnections between water resource systems. In highly stressed basins, moving water from downstream to upstream using energy supplied by photovoltaic systems can help adapt river basins to climate change.

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Fertigation to recover nitrate-polluted aquifer and improve a long time eutrophicated lake, Spain

Cited by 8 publications

References 60 publications

Spatiotemporal Variations in the Carbon Sequestration Capacity of Plateau Lake Wetlands Regulated by Land Use Control under Policy Guidance

Spatiotemporal Variations in the Carbon Sequestration Capacity of Plateau Lake Wetlands Regulated by Land Use Control under Policy Guidance

Understanding Nutrient Loads from Catchment and Eutrophication in a Salt Lagoon: The Mar Menor Case

Adapting Water Resources Management to Climate Change in Water-Stressed River Basins—Júcar River Basin Case

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