GATE Water Resources and Environmental Hydraulics: Global Water Resources – Previous Year Questions

1 GATE previous year questions on Global Water Resources (Water Resources and Environmental Hydraulics, Environmental Science and Engineering) with answers and explanations, from every paper.

1. GATE 2021 ES Q44 (2 marks, Multiple choice) – Water containsNa⁺92,K⁺19.5,Ca²⁺40,Mg²⁺24 mg/L. Atomic masses Na23,K39,Ca40,Mg24. Find SAR for irrigation assessment.