期刊名称：Interdisciplinaria Archaeologica : Natural Sciences in Archaeology
印刷版ISSN：1804-848X
出版年度：2014
卷号：V
期号：2
页码：147-160
出版社：Archaeological Centre Olomouc
摘要：The Lomas de Lachay region is located about 100 kilometres north of Lima, between Río Chancay and Río Huaura valleys. It is situated approximately 10 km from the coastline, where advection fogs meet the first ridges of the Andes allowing for the development of a peculiar ecosystem of fog oases known as lomas. Three distinct geosystems have been distinguished there: coastal desert, lomas and mountain desert. While during El Ni.o with episodes of ENSO the mountain desert and valleys of perennial rivers are devastated by catastrophic floods caused by torrential rains, in lomas El Ni.o less abundant precipitation comes about which permits the development of vegetation and also the presence of active springs during the dry season. Due to the increased availability of water in periods of frequent El Ni.o episodes human groups in the past were able to establish permanent settlements in the Lomas de Lachay area. When El Ni.o events became rare, however, only seasonal exploitation of lomas were possible. Changes in settlement pa- tterns in the research area were therefore strongly influenced by the frequency and magnitude of El Ni.o events. Moreover, due to the El Ni.o benevolent impact, only a lomas geosystem is convenient for human activity on a larger scale, thus the majority of the archaeological sites are located within the limits of fog oases
