Precipitation Features of the Luoyugou Basin in Recent 26 Years

DOI

10.2991/amcce-15.2015.197How to use a DOI?

Keywords

Luoyugou watershed; precipitation; Theissen polygon method; regression analysis; Mann-Kendall statistical test

Abstract

Precipitation is the main dynamic factors of soil erosion on the loess plateau region; the spatial and temporal distribution of precipitation has a great impact on the process of runoff and sediment yield. Luoyugou watershed is a typical small one of the third sub-region in gully and hilly regions of the Loess Plateau, which was laid the precipitation stations and the transfer stations for rainfall, runoff, sediment observation since the mid-1980s by the Tianshui Soil and Water Conservation Experimental station of Yellow River Conservancy Committee, who carried out the rule of basin soil erosion research. In this paper, on the basis of the observation data of Luoyugou watershed since 1985 to 2010, the precipitation features of the Luoyugou basin in recent 26 years were analyzed. And the analyzing results indicated that: The average annual rainfall of Luoyugou watershed is 548.4 mm, and the interannual and in-year precipitation of the watershed change greatly, uneven distribution of time and space; MK test showed that there is a slight increasing trend of the annual area rainfall, but is insignificant, and three break points occurred during the period on the base of the observed annual rainfall data. Meanwhile, relation between the annual precipitation, runoff and sediment yield was analyzed, and it turned out that the annual precipitation and annual runoff had a higher related degree. In conclusion, the rainfall has its own characteristics and has obvious impact on runoff and sediment yield. However, more study on the features of precipitation under different scales is required in the future.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Rui Jie Qin
AU  - Ping Li
AU  - Pei Qing Xiao
AU  - Le Ping An
PY  - 2015/04
DA  - 2015/04
TI  - Precipitation Features of the Luoyugou Basin in Recent 26 Years
BT  - Proceedings of the 2015 International Conference on Automation, Mechanical Control and Computational Engineering
PB  - Atlantis Press
SP  - 684
EP  - 689
SN  - 1951-6851
UR  - https://doi.org/10.2991/amcce-15.2015.197
DO  - 10.2991/amcce-15.2015.197
ID  - Qin2015/04
ER  -