作 者：
薛浩;于瑞宏;张艳霞;多兰;胡海珠;郝艳玲;吕喜玺
单 位：
内蒙古大学生态与环境学院内蒙古自治区河流与湖泊生态重点实验室;蒙古高原生态学与资源利用教育部重点实验室
关键词：
径流量;多时间尺度;趋势分析;突变分析;锡林河流域
摘 要：
草原区流域径流变化特征研究对于当地水资源合理开发和利用具有重要的应用价值和指导意义。以锡林河流域为研究区,利用Mann-Kendall趋势检验方法,分析1968—2015年径流深年代际变化、年际变化、四季变化以及年内变化等多时间尺度变化趋势。趋势分析结果表明:20世纪90年代锡林河流域平均径流深最大,且具较大变幅,其余年代均表现为减少趋势; 1968—2015年间年径流深随时间推移呈显著下降趋势,21世纪以后变化极为明显;各季节总体上呈下降趋势,其中,秋季下降趋势显著,但2005年后该季径流深几乎为零;年内径流深分布不均匀,变化趋势呈"双峰型",分别在4月和8月出现峰值。此外,基于Mann-Kendall突变检验,确定1984、2000年锡林河流域径流深发生突变。锡林河流域径流减少的主要因素为人类活动,其中人口增加、工业以及畜牧业发展等社会经济因素共同影响锡林河流域的径流。研究结果可为锡林河流域水资源优化配置及可持续利用提供科学依据。
译 名：
Temporal variation of runoff depth in the drainage basin of typical grassland area in Inner Mongolia:A case study of Xilin River Basin
作 者：
XUE Hao;YU Ruihong;ZHANG Yanxia;DUO Lan;HU Haizhu;HAO Yanling;LU Xixi;Inner Mongolia Key Laboratory of River and Lake Ecology,School of Ecology and Environment,Inner Mongolia University;Key Laboratory of Mongolian Plateau Ecology and Resource Utilization,Ministry of Education;
单 位：
XUE Hao%YU Ruihong%ZHANG Yanxia%DUO Lan%HU Haizhu%HAO Yanling%LU Xixi%Inner Mongolia Key Laboratory of River and Lake Ecology,School of Ecology and Environment,Inner Mongolia University%Key Laboratory of Mongolian Plateau Ecology and Resource Utilization,Ministry of Education
关键词：
runoff;;multiple time scales;;trend analysis;;abrupt change analysis;;Xilin River Basin
摘 要：
[Background] Most of the existing researches focus on large-scale watersheds and humid regions,but there are few studies on runoff changes in arid grassland basins,especially the systematic study of runoff variation laws at different time scales. The study on the characteristics of runoff changes in the basin of the grassland area has important application value and guiding significance for the reasonable development and utilization of local water resources. [Methods] Located in the southeastern part of Inner Mongolia,the Xilin River Basin is a temperate semi-arid continental monsoon climate. It has the characteristics of less precipitation,more evaporation,and larger temperature difference. The measured flow data from 1968-2015 are from Xilinhot Hydrological Station. Mann-Kendall trend test method was used to analyze the decennary,annual,seasonal,and inter-annual trends of runoff depth from 1968-2015 in the Xilin River Basin. The temporal and spatial variations of river runoff at home and abroad were compared to illustrate the differences between grassland-type rivers and large rivers. [Results]1)The average runoff in the 1990 s was the largest with large fluctuation,and that in the rest of years showed a decreasing trend. 2) The annual runoff during 1968-2015 demonstrated a significant decline over time. 3) The seasonal runoff showed a significant downward trend. Among them,the decline rate in the spring and summer was insignificant,while that in the autumn was significant,and the runoff in the autumn was almost zero after 2005. 4) The inter-annual runoff depth distribution was uneven with"bimodal",which peaked in April and August respectively. 5) According to the Mann-Kendall mutation test,a abrupt change of runoff depth in Xilin River Basin occurred in 1984 and 2000. The period from1968-1984 was defined as the base period,and the period from 1985-2000 and 2001-2015 was defined as an abrupt change period. Runoff increased during 1985-2000 by 22. 84% while compared with the baseline period. The runoff during 2001-2015 showed a significant decrease,by 42. 89%compared with the baseline period. [Conclusions]The main factor in the reduction of runoff in the Xilin River Basin is human activities,in which socio-economic factors such as population increases,industry and animal husbandry development affect the runoff of the Xilin River Basin. This study provides scientific basis for the optimal allocation of water resources in the Xilin River Basin. The series of ecological protection measures may reduce the impact of human activities on watershed runoff.
