Entry: diffuse contamination
URI: https://data.geoscience.earth/ncl/misc/102
Input of a substance emitted from moving sources, from sources with a large area or from many sources. In practice, two situations are commonly recognized: rural areas with diffuse source inputs typically from flooding, land spreading and aerial deposition; and urban areas where the diffuse source inputs come typically from traffic and industrial activities. Diffuse source input usually leads to sites that are relatively uniformly contaminated. At some sites, the input conditions can nevertheless cause a higher local input, such as near the source or where atmospheric deposition/rain is increased. Two types of main diffuse source input can be considered: one in rural areas (e.g. atmospheric deposits, spreading); and one in urban areas (e.g. traffic, industries). (ISO19258:2018 definition for diffuse contamination extended)
Core metadata
| is a | Concept | context conditions state |
| submitted by | leadadmin |
| accepted on | 8 Aug 2025 13:49:37.598 |
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All metadata properties
| date accepted |
8 Aug 2025 13:49:37.598
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| date submitted |
8 Aug 2025 13:49:19.468
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| definition |
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| item class |
context conditions state
| Concept
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| label |
diffuse contamination
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| notation |
102
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| register |
misc
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| status |
status experimental
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| type |
register item
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| version info |
2
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Definition
| definition |
Input of a substance emitted from moving sources, from sources with a large area or from many sources. In practice, two situations are commonly recognized: rural areas with diffuse source inputs typically from flooding, land spreading and aerial deposition; and urban areas where the diffuse source inputs come typically from traffic and industrial activities. Diffuse source input usually leads to sites that are relatively uniformly contaminated. At some sites, the input conditions can nevertheless cause a higher local input, such as near the source or where atmospheric deposition/rain is increased. Two types of main diffuse source input can be considered: one in rural areas (e.g. atmospheric deposits, spreading); and one in urban areas (e.g. traffic, industries). (ISO19258:2018 definition for diffuse contamination extended)
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| notation |
102
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| pref label |
diffuse contamination
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| source |
International Organization for Standardization (2018) ISO 19258:2018 – Soil quality – Guidance on the determination of background values.
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| type |
Concept
| context conditions state
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