1955～2011年滇西北纳帕海时空演变规律及驱动因素分析

Spatial-temporal Evolution and Driving Factors of Napahai Lake in Northwest Yunnan from 1955 to 2011

以1955～2011年具有代表性的18个年度36期的航空和卫星影像资料为研究数据，利用ERDASIMAGINE9．2、ArcMap10、Fragstats3．3、Excel等软件，系统分析了1955—2011年纳帕海水域面积和形状的时空演变规律和驱动因素。结果表明，1955—2011年随着年月的时间变化，纳帕海水域面积和形状在年度问和年度内变化均较大，水域面积和形状都处于增减无序的波动变化之中，无规律可循，充分说明纳帕海是一个典型的人工调控季节性高原湖泊；纳帕海演变是以人工驱动因素为主、自然驱动因素为辅，人工驱动因素和自然驱动因素共同作用的结果。研究结果为合理开展利用及科学保护纳帕海提供了参考依据。

Taking the aerial and satellite images of 36 periods belonging to 18 years from 1955 to 2011 as the data, using a series of software such as ERDAS IMAGINE 9.2, ArcMap 10, Fragstats 3.3 and Excel, the change of ar- ea and shape of Napahai lake and the driving factors were systematically analyzed. The study results were as fol- lows： 1 ） From 1955 to 2011, both area and shape of Napahai lake showed sharp changes both inter-annual and in- tra-annual, characterized by a kind of disordered fluctuation, which indicated that Napahai lake was a typical sea- sonal plateau lake under artificial regulations and interventions. 2） Evolution of Napahai lake was mainly driven by artificial factors, and natural factors played as the assistant factors. The study provided some reference for reasona- ble utilization and scientific protection of Napahai lake.