Hydroclimatological changes in the Bagmati River Basin, Nepal

Auteur(s) et Affiliation(s)

DHITAL, Y.P.

Dept. of Environmental Science and Engineering, School Science, Univ., Kathmandu, Nepal

TANG, Q.

Inst. of Geographic Sciences and Natural Resources Research, Beijing, Chine

SHI, J.

Inst. of Remote Sensing Applications, Chinese Academy of Sciences, Beijing, Chine

Description :
In this study, the temperatures (maximum and minimum), precipitation, and discharge data from 1980 to 2009 were used to detect the hydroclimatological changes in the Bagmati River Basin, Nepal. Simple linear regression and Mann-Kendall test statistic were used to examine the significant trend of temperature, precipitation, and discharge. Increasing trend of temperature was found in all seasons, although the change rate was different in different seasons for both minimum and maximum temperatures. Both precipitation and discharge trend were increasing in the pre-monsoon season, but decreasing in the post-monsoon season. Furthermore, the intensity of peak discharge was increasing, though there was not an obvious change in the intensity of maximum precipitation events. It is expected that all these changes have effects on agriculture, hydropower plant, and natural biodiversity in the mountainous river basin of Nepal.

Type de document :
Article de périodique

Source :
Journal of geographical sciences. Acta geographica sinica, issn : 1009-637X, 2013, vol. 23, n°. 4, p. 612-626, nombre de pages : 15, Références bibliographiques : 45 ref.

Date :
2013

Editeur :
Pays édition : Chine

Langue :
Anglais