Project tables often place a river, district, year, capacity and irrigated area in one row. The most stable entries are the river and broad location. District names can change when boundaries change. Storage capacity can mean gross, live or designed capacity; these should not be swapped. Area can mean culturable command, irrigation potential or actual area supplied in a season. Year can mean sanction, start, first water, commissioning or completion. Unless the question names the measure, avoid learning an isolated number.

The official AP Water Resources Information and Management System reports current reservoir levels by river basin. Those are operational snapshots: a September level is not a fixed GK fact. The Ministry of Ports reports cargo by financial year, also a snapshot. This book marks such data with dates. For an exam held months later, revise the latest state survey and departmental update separately.

A useful source hierarchy is Act or Gazette for legal status and districts, government department for current project or port operations, official district page for local features, and textbook for stable physical geography. Some district sites retain old template text after boundary changes. Where a page says 'proposed' while a later Gazette creates the district, the Gazette wins. This is why the new 28-district count is taught explicitly.

When two sources appear to disagree, write the exact claim being compared. 'Visakhapatnam is the only major port' and 'AP has many large ports' can both be true because legal class differs from cargo scale. 'Polavaram project in erstwhile West Godavari' and 'Polavaram district exists now' can also both be true.

Worked map reasoning

A table reports reservoir level, live storage, ayacut and canal length. Identify the unit and date of every entry. Live storage is a changing snapshot; ayacut describes a designed irrigation area; canal length is infrastructure extent. They cannot be added together or read as equivalent measures of service. When two reports disagree, first check the observation date, project stage and whether each counts the same component.

Active recall: close the book, place the named river or region on a blank map, and explain one likely exam confusion in your own words.