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Relation of irrigation return-flows to water chemistry and periphyton in the Lemhi River, Idaho. Research technical completion report, project A-041-IDA Item Info

Irrigation development in the Lemhi Valley is related to both the chemical quality of the river water and the instream algal populations. Nitrate concentrations in the river peaked shortly after onset of irrigation in the spring, then decreased through the summer. Nitrates also decreased downriver due to high algal demand and possible dentrification within the soiL Phosphate concentrations increased more slowly than did nitrates after onset of irrigation but increased consistently downriver. In late August, soluble phosphates were seven to eight times more abundant at the mouth of the river than in the headwaters. Nitrate concentrations ranged from <.10 in August to >2.8 mg/1 in November, while phosphates ranged from .008 mg/1 in August to .098 mg/1 in July. Total dissolved solids increased downriver, and ranged from 140 mg/1 in May to 385 mg/1 in August.

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Title:
Relation of irrigation return-flows to water chemistry and periphyton in the Lemhi River, Idaho. Research technical completion report, project A-041-IDA
Authors:
Halbach, Thomas; Falter, C. Michael
Date Created (ISO Standard):
1974-08
Description:
Irrigation development in the Lemhi Valley is related to both the chemical quality of the river water and the instream algal populations. Nitrate concentrations in the river peaked shortly after onset of irrigation in the spring, then decreased through the summer. Nitrates also decreased downriver due to high algal demand and possible dentrification within the soiL Phosphate concentrations increased more slowly than did nitrates after onset of irrigation but increased consistently downriver. In late August, soluble phosphates were seven to eight times more abundant at the mouth of the river than in the headwaters. Nitrate concentrations ranged from <.10 in August to >2.8 mg/1 in November, while phosphates ranged from .008 mg/1 in August to .098 mg/1 in July. Total dissolved solids increased downriver, and ranged from 140 mg/1 in May to 385 mg/1 in August.
Subjects:
irrigation-return flow bioassay algal growth
Location:
Lemhi River
Latitude:
44.97
Longitude:
-113.6
Collection:
IWRRI
IWRRI number:
197415
Rights:
Rights to the digital resource are held by the University of Idaho. http://www.uidaho.edu/
Publisher:
University of Idaho
Contributing Institution:
University of Idaho
Type:
Text
Format:
application/pdf
Cataloger:
wbv
Date Digitized:
2012

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Preferred Citation:
"Relation of irrigation return-flows to water chemistry and periphyton in the Lemhi River, Idaho. Research technical completion report, project A-041-IDA", Idaho Waters Digital Library, University of Idaho Library Digital Collections, https://www.lib.uidaho.edu/digital/iwdl/items/iwdl-halbach_1974.html
Rights
Rights:
Rights to the digital resource are held by the University of Idaho. http://www.uidaho.edu/
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