AIH Professional Hydrologist - Groundwater Examination study guide
AIH Professional Hydrologist - Groundwater Examination · Work through your exam, one topic at a time.
The Professional Hydrologist (PH) credential is issued by the American Institute of Hydrology (AIH), a non-profit scientific and educational organization founded in 1981 and described by AIH as the only nationwide organization offering certification to qualified hydrologic professionals. AIH positions the PH Exam for experienced professionals ready to demonstrate advanced knowledge and ethical leadership in the field, and states that its exams focus exclusively on knowledge and understanding of hydrology rather than broader or adjacent disciplines. AIH describes certification as a way for the public, employers, and clients to identify water professionals who meet high standards of hydrology knowledge, demonstrate qualified experience, and practice ethically. This independent study page is organized around the three groundwater-relevant areas AIH names for its examinations: fundamentals of hydrology, surface water hydrology, and groundwater hydrology. The AIH Professional Hydrologist - Groundwater Examination study guide has 3 sections and about 843 words.
01Fundamentals of Hydrology: The Water Balance and Basin Response
Every hydrologic problem rests on the continuity equation: P = ET + Q + ΔS + ΔG, where precipitation is partitioned into evapotranspiration, streamflow, storage change, and deep recharge. Candidates must be fluent in the components and their measurement: precipitation (gages, radar, areal averaging methods such as Thiessen polygons and isohyetal), potential versus actual evapotranspiration (Penman-Monteith, Blaney-Criddle, pan coefficients), infiltration (Horton, Green-Ampt, Philip), and the soil-moisture accounting that links them.
301 words, about 2 min02Surface Water Hydrology: Hydrographs, Frequency, and Routing
Surface water questions center on the streamflow hydrograph: rising limb, crest, recession, and baseflow separation. Candidates should understand the unit hydrograph, its convolution, and the assumptions of linearity and time invariance.
279 words, about 1 min03Groundwater Hydrology: Aquifers, Flow, and Well Hydraulics
Groundwater questions test aquifer types (confined, unconfined, perched, leaky), porosity versus specific yield versus specific retention, and hydraulic head. Darcy's law (Q = K·i·A) governs flow; transmissivity T = K·b (b = saturated thickness) and storativity S describe aquifer response.
263 words, about 1 min