Evolution of the dry zone water harvesting and management systems in Sri Lanka during the Anuradhapura Kingdom; a study based on ancient chronicles and lithic inscriptions

摘要

A significant number of written sources report on the development of ancient dry zone water harvesting and water management systems in Sri Lanka. This paper attempts to address the lack of a systematic assessment of the information given by sources on the spatial-temporal development of the system, using methods of source criticism. After the removal of double entries, 255 text passages containing 837 different records on ancient irrigation were compiled as a database for the period from the fifth century BCE to the tenth century CE. The majority of the 625 analyzed records were derived from inscriptions, 212 records originated from chronicles. Geocoding was successfully performed for 40 records. It was possible to link 173 text passages to a specific king's reign. Altogether 362 records (43.2%) mention a tank or its construction. The categories "grants of irrigation" and "irrigation incomes" are represented with 276 records (33%) and 75 records (9%). Records on canals and irrigation management occur with a share of 8.2% and 6.2%, equaling 69 and 52 records. The spatial distribution of records in general largely corresponds to the extent of the Dry Zone and northern intermediate zone. With 490 records, Anuradhapura district shows the highest density of information on the ancient water harvesting and management system. The analyzed data are not equally distributed throughout the investigated period and show a distinct peak in the second century CE. In conclusion, the conducted analysis documents the potential of the analyzed source genres for the derivation of information on different aspects related to the spatial, temporal and administrative development of the ancient water management system in Sri Lanka.