Determination of soil hydraulic parameters and evaluation of water dynamics and nitrate leaching in the unsaturated layered zone: A modeling case study in Central Croatia
- Defterdarović, Jasmina, Filipović, Lana, Kranjčec, Filip, Ondrašek, Gabrijel, Kikić, Diana, Novosel, Alen, Mustać, Ivan, Krevh, Vedran, Magdić, Ivan, Rubinić, Vedran, Bogunović, Igor, Dugan, Ivan, Čopec, Krešimir, He, Hailong, Filipović, Vilim
- Authors: Defterdarović, Jasmina , Filipović, Lana , Kranjčec, Filip , Ondrašek, Gabrijel , Kikić, Diana , Novosel, Alen , Mustać, Ivan , Krevh, Vedran , Magdić, Ivan , Rubinić, Vedran , Bogunović, Igor , Dugan, Ivan , Čopec, Krešimir , He, Hailong , Filipović, Vilim
- Date: 2021
- Type: Journal article
- Relation: Sustainability (Basel, Switzerland) Vol. 13, no. 12 (2021), p. 6688
- Full Text:
- Reviewed:
- Description: Nitrate leaching through soil layers to groundwater may cause significant degradation of natural resources. The aims of this study were: (i) to estimate soil hydraulic properties (SHPs) of the similar soil type with same management on various locations (ii) to determine annual water dynamics and (iii) to estimate the impact of subsoil horizon properties on nitrate leaching. The final goal was to compare the influence of different SHPs and layering on water dynamics and nitrate leaching. The study was conducted in central Croatia (Zagreb), at four locations on Calcaric Phaeozem, Calcaric Regosol, and Calcaric Fluvic Phaeozem soil types. Soil hydraulic parameters were estimated using the HYPROP system and HYPROP-FIT software. Water dynamics and nitrate leaching were evaluated using HYDRUS 2D/3D during a period of 365 days. The amount of water in the soil under saturated conditions varied from 0.422 to 0.535 cm3 cm−3 while the hydraulic conductivity varied from 3 cm day−1 to 990.9 cm day−1. Even though all locations have the same land use and climatic conditions with similar physical properties, hydraulic parameters varied substantially. The amount and velocity of transported nitrate (HYDRUS 2D/3D) were affected by reduced hydraulic conductivity of the subsoil as nitrates are primarily transported via advective flux. Despite the large differences in SHPs of the topsoil layers, the deeper soil layers, having similar SHPs, imposed a buffering effect preventing faster nitrate downward transport. This contributed to a very similar distribution of nitrates through the soil profile at the end of simulation period. This case study indicated the importance of carefully selecting relevant parameters in multilayered soil systems when evaluating groundwater pollution risk.
- Authors: Defterdarović, Jasmina , Filipović, Lana , Kranjčec, Filip , Ondrašek, Gabrijel , Kikić, Diana , Novosel, Alen , Mustać, Ivan , Krevh, Vedran , Magdić, Ivan , Rubinić, Vedran , Bogunović, Igor , Dugan, Ivan , Čopec, Krešimir , He, Hailong , Filipović, Vilim
- Date: 2021
- Type: Journal article
- Relation: Sustainability (Basel, Switzerland) Vol. 13, no. 12 (2021), p. 6688
- Full Text:
- Reviewed:
- Description: Nitrate leaching through soil layers to groundwater may cause significant degradation of natural resources. The aims of this study were: (i) to estimate soil hydraulic properties (SHPs) of the similar soil type with same management on various locations (ii) to determine annual water dynamics and (iii) to estimate the impact of subsoil horizon properties on nitrate leaching. The final goal was to compare the influence of different SHPs and layering on water dynamics and nitrate leaching. The study was conducted in central Croatia (Zagreb), at four locations on Calcaric Phaeozem, Calcaric Regosol, and Calcaric Fluvic Phaeozem soil types. Soil hydraulic parameters were estimated using the HYPROP system and HYPROP-FIT software. Water dynamics and nitrate leaching were evaluated using HYDRUS 2D/3D during a period of 365 days. The amount of water in the soil under saturated conditions varied from 0.422 to 0.535 cm3 cm−3 while the hydraulic conductivity varied from 3 cm day−1 to 990.9 cm day−1. Even though all locations have the same land use and climatic conditions with similar physical properties, hydraulic parameters varied substantially. The amount and velocity of transported nitrate (HYDRUS 2D/3D) were affected by reduced hydraulic conductivity of the subsoil as nitrates are primarily transported via advective flux. Despite the large differences in SHPs of the topsoil layers, the deeper soil layers, having similar SHPs, imposed a buffering effect preventing faster nitrate downward transport. This contributed to a very similar distribution of nitrates through the soil profile at the end of simulation period. This case study indicated the importance of carefully selecting relevant parameters in multilayered soil systems when evaluating groundwater pollution risk.
Developing an evidence base for assessing natural capital risks and dependencies in lending to Australian wheat farms
- Cojoianu, Theodor, Ascui, Francisco
- Authors: Cojoianu, Theodor , Ascui, Francisco
- Date: 2018
- Type: Text , Journal article
- Relation: Journal of Sustainable Finance and Investment Vol. 8, no. 2 (2018), p. 95-113
- Full Text:
- Reviewed:
- Description: Farmers are highly dependent on stocks of natural capital, and lenders are in turn exposed to natural capital through their loans to farmers. However, the traditional process for assessing a farmer’s credit risk relies primarily on historical financial data. Banks’ consideration of environmental factors tends to be limited to major risks such as contaminated land liabilities, and to large project and corporate finance, as opposed to the smaller loans typical of the Australian agricultural sector. The relevant risks and dependencies for agriculture vary by sub-sector and geography, and there is a lack of standardised methodologies and evidence to support risk assessment. We provide an evidence base to support natural capital risk assessment for a single sub-sector of Australian agriculture–wheat farming. We show that such an assessment is possible, with a combination of quantitative and qualitative inputs, but the complexity and interconnectedness of natural capital processes is a challenge, particularly for soil health. © 2017, © 2017 Informa UK Limited, trading as Taylor & Francis Group.
- Authors: Cojoianu, Theodor , Ascui, Francisco
- Date: 2018
- Type: Text , Journal article
- Relation: Journal of Sustainable Finance and Investment Vol. 8, no. 2 (2018), p. 95-113
- Full Text:
- Reviewed:
- Description: Farmers are highly dependent on stocks of natural capital, and lenders are in turn exposed to natural capital through their loans to farmers. However, the traditional process for assessing a farmer’s credit risk relies primarily on historical financial data. Banks’ consideration of environmental factors tends to be limited to major risks such as contaminated land liabilities, and to large project and corporate finance, as opposed to the smaller loans typical of the Australian agricultural sector. The relevant risks and dependencies for agriculture vary by sub-sector and geography, and there is a lack of standardised methodologies and evidence to support risk assessment. We provide an evidence base to support natural capital risk assessment for a single sub-sector of Australian agriculture–wheat farming. We show that such an assessment is possible, with a combination of quantitative and qualitative inputs, but the complexity and interconnectedness of natural capital processes is a challenge, particularly for soil health. © 2017, © 2017 Informa UK Limited, trading as Taylor & Francis Group.
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