Annual change trend of precipitation in representative watershed of Loess hilly region
Based on some characteristic indexes of precipitation, the annual precipitation change characteristices at Yangou watershed in the Loess hilly region were studied, and the locally meteoric water line （LMWL） was obtained. The results showed that the annual change of precipitation varied greatly. The number of rainy year and dry year were nearly same. But the number of continuous drought year was higher than that of continuous rainy year. The change of precipitation decreased year by year. The LMWL of study area was δD = 7. 5537δ^18O ＋ 4. 6211. It was different significantly from the LMWL of China and the global meteoric water line （GMWL）. Before the rainy season, the dexcess of study area was higher than that of Xihn. But in the rainy season, the dexcess in study area decreased and was lower than Xihn.
precipitationtemporal variabilitymeteoric water lined -excessloess hilly region
NETL
NSTL
万方数据
维普
