自然和不同程度人类活动对干旱区河流演变过程与驱动因素的影响——以疏勒河为例

Analysis of Processes and Drivers of River Evolution in Arid Zones Under the Influence of Natural and Different Levels of Human Activities：A Case Study of the Shule River

摘要

基于区域古气候序列、人类活动记录、古气候模拟和详细的环境历史记录，探讨全新世气候变化和人类活动对中国祁连山西部疏勒河河流演变的影响。结果表明，在全新世早中期，疏勒河洪积扇的河流演变与区域气候波动密切相关。全新世晚期，疏勒河开始出现洪水农业。进入历史时期，人口增加和耕地面积扩大使河水使用量的增加，其他地区无法获得应得的水资源供给，进而导致区域水文生态系统失衡。

Abstract

Based on regional paleoclimate sequences， records of human activities，paleoclimate simulations， and detailed environmental historical records， we discuss the impacts of Holocene climate change and human activities on the evolution of the Shule River in the western Qilian Mountains， China. The results indicate that during the early to mid-Holocene， the river evolution of the Shule River alluvial fan was closely related to regional climate fluctuations. In the late Holocene， flood agriculture began to emerge along the Shule River. During the historical period， population growth and the expansion of arable land led to increased river water usage， resulting in decreased access to the expected distribution of water resources in other regions， which in turn has caused imbalances in the regional hydrological ecosystem.

关键词

河流演变 / 干旱地区 / 人类活动 / 古气候 / 驱动因素 / 疏勒河

Key words

river evolution / arid region / human activity / ancient climate / driving factors / Shule River