Modeling water flow and phosphorus sorption in a soil amended with sewage sludge and olive pomace as compost or biochar
- Filipović, Vilim, Černe, Marko, Šimůnek, Jiří, Filipović, Lana, Romić, Marija, Ondrašek, Gabrijel, Bogunović, Igor, Mustać, Ivan, Krevh, Vedran, Ferenčević, Anja, Robinson, David, Palčić, Igor, Pasković, Igor, Goreta Ban, Smiljana, Užila, Zoran, Ban, Dean
- Authors: Filipović, Vilim , Černe, Marko , Šimůnek, Jiří , Filipović, Lana , Romić, Marija , Ondrašek, Gabrijel , Bogunović, Igor , Mustać, Ivan , Krevh, Vedran , Ferenčević, Anja , Robinson, David , Palčić, Igor , Pasković, Igor , Goreta Ban, Smiljana , Užila, Zoran , Ban, Dean
- Date: 2020
- Type: Text , Journal article
- Relation: Agronomy (Basel) Vol. 10, no. 8 (2020), p. 1163
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- Description: Organic amendments are often reported to improve soil properties, promote plant growth, and improve crop yield. This study aimed to investigate the effects of the biochar and compost produced from sewage sludge and olive pomace on soil hydraulic properties, water flow, and P transport (i.e., sorption) using numerical modeling (HYDRUS-1D) applied to two soil types (Terra Rosa and Rendzina). Evaporation and leaching experiments on soil cores and repacked soil columns were performed to determine the soil water retention, hydraulic conductivity, P leaching potential, and P sorption capacity of these mixtures. In the majority of treatments, the soil water retention showed a small increase compared to the control soil. A reliable fit with the modified van Genuchten model was found, which was also confirmed by water flow modeling of leaching experiments (R2 0.99). The results showed a high P sorption in all the treatments (Kd 21.24 to 53.68 cm3 g−1), and a high model reliability when the inverse modeling procedure was used (R2 0.93–0.99). Overall, adding sewage sludge or olive pomace as compost or biochar improved the Terra Rosa and Rendzina water retention and did not increase the P mobility in these soils, proving to be a sustainable source of carbon and P-rich materials.
- Authors: Filipović, Vilim , Černe, Marko , Šimůnek, Jiří , Filipović, Lana , Romić, Marija , Ondrašek, Gabrijel , Bogunović, Igor , Mustać, Ivan , Krevh, Vedran , Ferenčević, Anja , Robinson, David , Palčić, Igor , Pasković, Igor , Goreta Ban, Smiljana , Užila, Zoran , Ban, Dean
- Date: 2020
- Type: Text , Journal article
- Relation: Agronomy (Basel) Vol. 10, no. 8 (2020), p. 1163
- Full Text:
- Reviewed:
- Description: Organic amendments are often reported to improve soil properties, promote plant growth, and improve crop yield. This study aimed to investigate the effects of the biochar and compost produced from sewage sludge and olive pomace on soil hydraulic properties, water flow, and P transport (i.e., sorption) using numerical modeling (HYDRUS-1D) applied to two soil types (Terra Rosa and Rendzina). Evaporation and leaching experiments on soil cores and repacked soil columns were performed to determine the soil water retention, hydraulic conductivity, P leaching potential, and P sorption capacity of these mixtures. In the majority of treatments, the soil water retention showed a small increase compared to the control soil. A reliable fit with the modified van Genuchten model was found, which was also confirmed by water flow modeling of leaching experiments (R2 0.99). The results showed a high P sorption in all the treatments (Kd 21.24 to 53.68 cm3 g−1), and a high model reliability when the inverse modeling procedure was used (R2 0.93–0.99). Overall, adding sewage sludge or olive pomace as compost or biochar improved the Terra Rosa and Rendzina water retention and did not increase the P mobility in these soils, proving to be a sustainable source of carbon and P-rich materials.
Management to insulate ecosystem services from the effects of catchment development
- Authors: Gell, Peter
- Date: 2018
- Type: Text , Conference proceedings
- Relation: 2nd International Conference on Energy, Environmental and Information System, ICENIS 2017; Semarang, Indonesia; 15th-16th August 2017; published in E3S Web of Conferences Vol. 31, p. 1-6
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- Reviewed:
- Description: Natural ecosystems provide amenity to human populations in the form of ecosystem services. These services are grouped into four broad categories: Provisioning-food and water production; regulating-control of climate and disease; supporting-crop pollination; and cultural-spiritual and recreational benefits. Aquatic systems provide considerable service through the provision of potable water, fisheries and aquaculture production, nutrient mitigation and the psychological benefits that accrue from the aesthetic amenity provided from lakes, rivers and other wetlands. Further, littoral and riparian ecosystems, and aquifers, protect human communities from sea level encroachment, and tidal and river flooding. Catchment and water development provides critical resources for human consumption. Where these provisioning services are prioritized over others, the level and quality of production may be impacted. Further, the benefits from these provisioning services comes with the opportunity cost of diminishing regulating, supporting and cultural services. This imbalance flags concerns for humanity as it exceeds recognised safe operating spaces. These concepts are explored by reference to long term records of change in some of the world's largest river catchments and lessons are drawn that may enable other communities to consider the balance of ecosystems services in natural resource management.
- Authors: Gell, Peter
- Date: 2018
- Type: Text , Conference proceedings
- Relation: 2nd International Conference on Energy, Environmental and Information System, ICENIS 2017; Semarang, Indonesia; 15th-16th August 2017; published in E3S Web of Conferences Vol. 31, p. 1-6
- Full Text:
- Reviewed:
- Description: Natural ecosystems provide amenity to human populations in the form of ecosystem services. These services are grouped into four broad categories: Provisioning-food and water production; regulating-control of climate and disease; supporting-crop pollination; and cultural-spiritual and recreational benefits. Aquatic systems provide considerable service through the provision of potable water, fisheries and aquaculture production, nutrient mitigation and the psychological benefits that accrue from the aesthetic amenity provided from lakes, rivers and other wetlands. Further, littoral and riparian ecosystems, and aquifers, protect human communities from sea level encroachment, and tidal and river flooding. Catchment and water development provides critical resources for human consumption. Where these provisioning services are prioritized over others, the level and quality of production may be impacted. Further, the benefits from these provisioning services comes with the opportunity cost of diminishing regulating, supporting and cultural services. This imbalance flags concerns for humanity as it exceeds recognised safe operating spaces. These concepts are explored by reference to long term records of change in some of the world's largest river catchments and lessons are drawn that may enable other communities to consider the balance of ecosystems services in natural resource management.
Salinity on the southeastern Dundas Tableland, Victoria
- Dahlhaus, Peter, MacEwan, Richard, Nathan, Erica, Morand, Vincent J
- Authors: Dahlhaus, Peter , MacEwan, Richard , Nathan, Erica , Morand, Vincent J
- Date: 2000
- Type: Journal article
- Relation: Australian Journal of Earth Sciences Vol. 47, no. 1 (2000), p. 3-11
- Full Text:
- Reviewed:
- Description: Historical evidence of early salinity, vegetation and landuse changes, and pedological studies have been used in formulating a new model for salinity processes acting on the Dundas Tableland in southwestern Victoria. Contrary to previous assumptions, salinity in this area was a feature of the pre-European landscape and was noted in the earliest surveys and journals. Analysis of historical records show an initial post-settlement increase in the tree numbers, followed by a rapid decline much later than previously assumed. Accumulation of salts in the regolith may be attributed to marine incursions during the Miocene and Pliocene, the extensive weathering to develop a deep regolith, and wind-blown and cyclic salt accumulation. A trend analysis of historical streamflow and bore hydrograph records does not indicate rising groundwater levels. The pedological features of duplex and sodic soil profiles support a history of prolonged seasonal waterlogging. A model with seasonal lateral flow of water through the upper regolith can better account for the spread of salinity than the rising groundwater hypothesis. By control of waterlogging, land managers could improve soil structure, enhance root growth and soil water use, as well as inhibit the spread of salinity.
- Authors: Dahlhaus, Peter , MacEwan, Richard , Nathan, Erica , Morand, Vincent J
- Date: 2000
- Type: Journal article
- Relation: Australian Journal of Earth Sciences Vol. 47, no. 1 (2000), p. 3-11
- Full Text:
- Reviewed:
- Description: Historical evidence of early salinity, vegetation and landuse changes, and pedological studies have been used in formulating a new model for salinity processes acting on the Dundas Tableland in southwestern Victoria. Contrary to previous assumptions, salinity in this area was a feature of the pre-European landscape and was noted in the earliest surveys and journals. Analysis of historical records show an initial post-settlement increase in the tree numbers, followed by a rapid decline much later than previously assumed. Accumulation of salts in the regolith may be attributed to marine incursions during the Miocene and Pliocene, the extensive weathering to develop a deep regolith, and wind-blown and cyclic salt accumulation. A trend analysis of historical streamflow and bore hydrograph records does not indicate rising groundwater levels. The pedological features of duplex and sodic soil profiles support a history of prolonged seasonal waterlogging. A model with seasonal lateral flow of water through the upper regolith can better account for the spread of salinity than the rising groundwater hypothesis. By control of waterlogging, land managers could improve soil structure, enhance root growth and soil water use, as well as inhibit the spread of salinity.
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