A groundwater quality survey of an unsewered, semi‐rural area
| Autor: | L. W. Sinton |
|---|---|
| Rok vydání: | 1982 |
| Předmět: |
Hydrology
geography geography.geographical_feature_category Ecology Water table media_common.quotation_subject Septic tank Aquifer Aquatic Science Coliform bacteria Fecal coliform chemistry.chemical_compound Nitrate chemistry Soil water Environmental science Ecology Evolution Behavior and Systematics Groundwater Water Science and Technology media_common |
| Zdroj: | New Zealand Journal of Marine and Freshwater Research. 16:317-326 |
| ISSN: | 1175-8805 0028-8330 |
| DOI: | 10.1080/00288330.1982.9515975 |
| Popis: | A baseline groundwater quality survey of 120 household wells in an unsewered area at Yaldhurst, near Christchurch, was carried out between September and December, 1976. Ammonia‐N levels were below the detection limit (0.02 g m‐3) in all samples. Nitrate‐N, conductivity, and chloride levels tended to vary according to well depth and location, being lower in the deeper wells and in wells located in an area of shallow, stony soils. Approximately 33% of the wells contained coliform bacteria, faecal coliform bacteria or faecal streptococci. A subset of 25 wells was sampled fortnightly from January to August 1977. From January to June, mean nitrate‐N and conductivity levels remained stable at approximately 1.5 g m‐3 and 11.2 mS m‐1 respectively. An increase in these levels to 3.3 g m‐3 and 15.8 mS m‐1 in July‐August corresponded with a rise in the water table. Leaching losses from soils probably accounted for most of the nitrate entering the Yaldhurst aquifers, the contribution by septic tank systems b... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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