Publications

Titles

English :

Environmental Assessment of Drainage Water in Nile Delta for Sustainable Agricultural Development: I- Salinity Hazard

Arabic :

التقييم البيئى لمياه المصارف فى دلتا النيل لتحقيق التنمية الزراعية المستدامة: أ- الأملاح الكلية الذائبة

Abstract

This study was carried out to assess the drainage water quality for reusing irrigation. Samples of drainage water (each represent drain or Canal) were collected monthly during the period from June, 1999 to May, 2000 for Nile Delta region. The results indicated that: - In Eastern Delta, a 45% of the total collected samples of Bahr El-Baqr area have a total soluble salts less than 2000 mg/l and were classified as “slight to moderate” grade, while 55% more than 2000 mg/l and were classified as “severe” for irrigation. Meanwhile, at Bahr Hadus areas are 92.3% and 7.7% less and more than 2000 mg/l, respectively. The adj. SAR values are classified as “slight to moderate” and “severe” grades. The calculated pHc of all samples is less than 8.4, the soluble calcium from drain water tends to precipitate in soil irrigated with such water. - No changes in water quality due to salinity in irrigation canals before and after mixing with drainage water officially, they are ranged from 242 to 597 mg/l, which are considered none saline. Whereas, at Dafan and El-Salam canals have moderately saline water. They reached 1460 and 988 mg/l, respectively, which classified as “slight to moderate”. - In Middle Delta, a 64.0% of the total collected samples have a total soluble salts less than 2000 mg/l and classified as “slight to moderate” grade while 36.0% more than 2000 mg/l and classified as “severe” for irrigation. The adj. SAR values are classified as ”slight to moderate” and “severe” grades for irrigation. The calculated pHc of all samples is less than 8.4, the soluble calcium from drain water tends to precipate in soil irrigated with such water. - No changes in water quality due to salinity in irrigation canals before and after mixing with drainage water officially, they are ranged from 432 to 599 gm/l, which is consider none saline. Whereas, Bahr Tira canal water is moderately saline after mixing with El-Gharbia drain, it reached 1043 mg/l. - In Western Delta, a 69.6% of the total collected samples have a total soluble salts less than 2000 mg/l and classified as “slight to moderate” grade for irrigation while 30.4% more than 2000 mg/l and classified as “severe”. The adj. SAR values are classified as “slight to moderate” and “severe” grades, respectively. The calculated pHc of all samples is less than 8.4, the soluble calcium from drain water tends to precipitate in soil irrigated with such water. - No changes in water quality due to salinity in irrigation canals before and after mixing with drainage water officially, they are ranged from 279 to 492 gm/l, which is consider none saline. Whereas, El-Nubaria canal has changed its quality and consider “slight to moderate” grade. It ranged from 844 to 1532 mg/l after mixing with drain water namely; El-Boustan (km 29), No.1 (km 54), No.3 (km 55) and El-Omoum at Maruit (km 86)

Publication year

2000

Pages

409-441

Availability location

Soils, Water and Environment Research Institute, ARC, 9 Cairo Univ. St., Giza, Egypt

Availability number

Organization Name

Soil, Water and Environment Research Institute (SWERI)

City

Alexandria

serial title