ENVIRONMENTAL ISOTOPES OF PRECIPITATION, GROUNDWATER AND SURFACE WATER IN YANSHAN MOUNTAIN, CHINA - Advances in Geosciences - page 11

ENVIRONMENTAL ISOTOPES OF PRECIPITATION,
GROUNDWATER AND SURFACE WATER
IN YANSHAN MOUNTAIN, CHINA
K. AJI ∗,¶, , T. CHANGYUAN ∗ ,A.KONDOH † , S. XIANFANG ‡
and Y. SAKURA §
∗ Graduate School of Science and Technology, Chiba University, Japan
† Center for Environmental Remote Sensing, Chiba University, Japan
‡ Institute of Geographical Sciences & Natural Resources Research,
Chinese Academy of Science (CAS), Beijing, China
§ Department of Earth Sciences, Faculty of Science, Chiba University, Japan
¶ [e-mail]
[e-mail]
Analysis of stable isotopes in precipitation, groundwater and surface water in
Yanshan Mountain of the North China Plain (NCP) was carried out to identify
the hydrological processes. In Yanshan Mountain the δ Dand δ 18 Ovaluesof
water show a very distinct pattern, with wide ranged isotope values from high
altitude to mountain hill. The distribution of δ Dand δ 18 O in precipitation,
groundwater and surface water suggested that the groundwater was recharged
by the direct diffuse recharge of precipitation, as well as from the surface water.
Meanwhile the ground water recharged to the surface water at different region
with different form.
1. Introduction
Depended heavily upon groundwater resources, the NCP is the China's lead-
ing industrial and agricultural region that produces more than 50 percent of
the nation's wheat and 33% of its maize, and is the home to more than 200
million people (State Statistics Bureau 1999 6 ). In recent decades the aquifers
in the NCP have been rapidly developed for urban and industrial water sup-
ply, as well as agricultural irrigation. In fact, groundwater in the NCP is used
at a rate much higher than that with which the aquifers are filled.
Previous hydrochemical investigation of the NCP were focused on the
pleoclimatic change. 1 Several studies have shown that the groundwater in
the area near Taihang Mountain, which was taken from comparatively shal-
low wells, is quite young and belongs to the recharge area for the NCP. The
purpose of this paper is to explain the hydrological characteristics in the
Yanshan Mountain, the north part of the NCP, where study has previously
been limited.
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