The electricity cost of agricultural irrigation and drainage in the Dahe Ex- periment Station was analyzed. The results showed that from 2012 to 2016, the annual total power and total electricity cost increased year b...The electricity cost of agricultural irrigation and drainage in the Dahe Ex- periment Station was analyzed. The results showed that from 2012 to 2016, the annual total power and total electricity cost increased year by year. The higher the electricity consumption was, the lower the factor adjusted power price was. The an- nual factor adjusted power price decreased from 532.5 yuan （above the national standard） to -599.78 yuan （below the national standard）. The electricity consumption was always highest in June. The more the rainfall from June to September was, the less the monthly electricity usage was. The collect electricity charge to total electricity charge ratio was 1.26%-1.34%, the directory electricity charge to total electricity charge ratio was 96.34%-99.80%, and the electricity loss of transformer was 288-496 kW/h.展开更多
Objective:To demonstrate the technical feasibility of the reuse of agricultural drainage water for irrigation.Methods:The agricultural drainage water near Banjar El-Sokar,Borg El-Arab City,Alexandria,Egypt was collect...Objective:To demonstrate the technical feasibility of the reuse of agricultural drainage water for irrigation.Methods:The agricultural drainage water near Banjar El-Sokar,Borg El-Arab City,Alexandria,Egypt was collected.The measured heavy metals in the drainage water were compared with the permissible levels stated in environmental regulations,Law No.48 of 1982 concerning the protection of the Nile River and waterways from pollution.Results:Heavy metals and trace elements were detected in this agricultural drainage water as following:Al(1.64 mg/L),Ca(175.00 mg/L),Cd(1.87 mg/L),Co(2.23 mg/L),Cu(1.71 mg/L),Fe(1.64 mg/L),K(20.50 mg/L),and Pb(2.81 mg/L).According to allowable limits,item such as Fe is lower than permissible level of 3.00 mg/L,while Pb and Cu are higher than 0.10 mg/L and 1.00 mg/L,respectively.Conclusions:Vegetables irrigated with such drainage water are not safe for human and animal consumption.Accordingly,the study suggests and recommeds remediation of drainage water using physical,chemical and/or biological methods.展开更多
文摘The electricity cost of agricultural irrigation and drainage in the Dahe Ex- periment Station was analyzed. The results showed that from 2012 to 2016, the annual total power and total electricity cost increased year by year. The higher the electricity consumption was, the lower the factor adjusted power price was. The an- nual factor adjusted power price decreased from 532.5 yuan （above the national standard） to -599.78 yuan （below the national standard）. The electricity consumption was always highest in June. The more the rainfall from June to September was, the less the monthly electricity usage was. The collect electricity charge to total electricity charge ratio was 1.26%-1.34%, the directory electricity charge to total electricity charge ratio was 96.34%-99.80%, and the electricity loss of transformer was 288-496 kW/h.
文摘Objective:To demonstrate the technical feasibility of the reuse of agricultural drainage water for irrigation.Methods:The agricultural drainage water near Banjar El-Sokar,Borg El-Arab City,Alexandria,Egypt was collected.The measured heavy metals in the drainage water were compared with the permissible levels stated in environmental regulations,Law No.48 of 1982 concerning the protection of the Nile River and waterways from pollution.Results:Heavy metals and trace elements were detected in this agricultural drainage water as following:Al(1.64 mg/L),Ca(175.00 mg/L),Cd(1.87 mg/L),Co(2.23 mg/L),Cu(1.71 mg/L),Fe(1.64 mg/L),K(20.50 mg/L),and Pb(2.81 mg/L).According to allowable limits,item such as Fe is lower than permissible level of 3.00 mg/L,while Pb and Cu are higher than 0.10 mg/L and 1.00 mg/L,respectively.Conclusions:Vegetables irrigated with such drainage water are not safe for human and animal consumption.Accordingly,the study suggests and recommeds remediation of drainage water using physical,chemical and/or biological methods.
