JOU RNAL OF DESERT RESEARCH

Transcription

1 JOU RNAL OF DESERT RESEARCH Vol. 29 No. 2 Mar : X(2009) , 2 (1.,, ; 2., ) :, ( Piper),,, ;,,;, ;, 32 a : ; ; ; : P641 : A,,,, 2,,,,,,, 2,,,,, 2,,,,,, [1-2 ] [3-5 ] [6 ] [ 7-8 ],, 1,,,,,,, 2 :,,,, ;,,,, : ; : : (2009CB421305) ; (O7V70020SZ) : (1977 ), ( ),,, ac. cn ; com

2 2 : 371, 2,,,, 185 km ( 1),2,, ;,,,,,, 3,, 3 ( 2),,, 2, 2 1 2, m, ; 2,, ;, 2 2, m,, ; 2, m, 2 38 ( 1),, 18 O, CO2 H2 O2CO2 CO2, MAT2 252,

3 (SMOW) 18 O, 0. 2 ;, p H, ( TDS) 2,, ;( T), Quantulus21220, : > >, > 50 %, HCO - 3, Ca 2 + Mg 2 + ; > >, > 50 %, HCO - 3 SO 2-4, I, Ca 2 + Mg 2 + ( 3) 3 Fig. 3 Hydrochemical features of the sampled water by Piper diagram,,, HCO - 3 2SO 2-4 Mg 2 + 2Na + HCO SO 2-4 Mg 2 + 2Na + 2Ca 2 + SO 2-4 2HCO - 3 2Cl - Mg 2 + 2Na + SO 2-4 2Cl - Na + 2Mg 2 + Ca 2 + > Mg 2 + > Na +,,, Ca 2 + Mg 2 + Na + ; HCO - 3 SO 2-4 Cl - [ 9-10 ],,, Cl - [11 ],, : Mg 2 + Na + Cl - SO 2-4 (meq L - 1 ), ; Mg 2 + Na + ( ) ( ),Cl - ( 4) SO 2-4 5, : p H T D S, g L - 1 ; 18 O T, T, 18 O,, T D S,, 4 Na + Ca 2 + Mg 2 + Fig. 4 Na +, Ca + and Mg + relationship s in river water of the study area

4 2 : 373, p H T,,, T, CO2 p H ; T D S 18 O, 3 m, T D S 18 O,,,, p H 18 O 5, 18 O, 18 O, 18 O,, 18 O 18 O, 18 O, - 815, 18 O T, 3, 3 5 TDS 18 O p H ( T) Fig. 5 Comparison of TDS, 18 O, p H and Tritium in water samples 2,,, Na + Mg 2 +, 18 O 2 ; T ( > 5 Tu) ( > 5 Tu) ; TDS ( ) TDS ; 18 O,, 2,,, 5 10,, m 50 m,, 18 O, - 718,,

5 O,,,,,,,,,, 18 O, 18 O,,, T, T, T 18 O ; 18 O,T, 16 Tu, T, 23 Tu ; T 18 O Tu ;, ( ),, T 18 O, 18 O, - 615,, ;,, 18 O, T D S ; T D S 18 O ;,,,, ;, ;,,, 18 O 4,,,,, T (19171 Tu), ; T (35131 Tu Tu), ; T (24131 Tu), T (25185 Tu),; T (33167 Tu), ; T ( Tu), ; ( PFM) [12 ], : N = N 0 e - t (1) : N ; (010558) ; N 0 ; t ( ) (1),,, a ;, 2 9 a,,, 1 9 a,,,, 2 16 a ; 16 a,2 a ;,,, 2 8 a 5,, : 1) 2, 2, 2) 2,,,, 2, 3)

6 2 : 375,, 4), (21 32 a), ; 2, 5),,,, ( References) : [ 1 ] Silliman S E, Booth D F. Analysis of time2series measurements of sediment temperature for identification of gaining vs. losing portions of J uday Creek, Indiana [ J ]. J Hydrol,1993,146 (1-4) : [ 2 ] Belanger T V, Walker R B. Groundwater seepage in the Indian River Lagoon, Florida [ C]/ / Krishna J. Proc. Internat. Symp. Tropical Hydrology and Caribbean Water Resour : [ 3 ] Kortatsil B K. Hydrochemical characterization of groundwater in the Accra plains of Ghana [ J ]. Environmental Geology, 2006,50 (3) : [ 4 ],,,. [J ].,2004,24 (6) : [ 5 ],,,. [J ].,2006,26 (5) : [ 6 ] Christopher J N, Matthew J T. Modeling Multiaquifer Wells wit h MODFLOW [J ]. Ground Water,2004,42 (6) : [ 7 ] Bajjali W. Recharge mechanism and hydrochemistry evaluation of groundwater in the Nuaimeh area, Jordan, using environmental isotope techniques [J ]. Hydrogeology Journal, 2006,14 : [ 8 ] Song Xianfang, Liu Xiangchao, Xia J un, et al. A study of interaction between surface water and groundwater using environmental isotope in Huaisha River basin [J ]. Science in China Series D : Eart h Science,2006,49 (12) : [ 9 ] Stuyfzand P J. Patterns in groundwater chemistry resulting from groundwater flow [J ]. Hydrogeology Journal,1999,7 : [ 10 ] Tot h J. Groundwater as a geologic agent : an overview of t he causes, processes and manifestations [ J ]. Hydrogeology Journal,1999,7 :1-14. [ 11 ] Clark I D, Fritz P. Environmental Isotopes in Hydrogeology [ M ]. CRC Press,1997 :100. [ 12 ],,,. [J ].,2006,26 (1) : Analysis of Groundwater Replenishment in the Middle Reaches of Heihe River ZHANG Ying2hua 1, WU Yan2qing 2 (1. Key L aboratory of W ater Cycle & Related L and S urf ace Processes, Institute of Geographic Sciences & N atural Resources Research, CA S, Beijing , China ; 2. School of Environmental Science and Engineering, S hanghai J iaotong Universit y, S hanghai , China) Abstract : Heihe Rive r, as one of t he greatest inland rivers in China, was conf ronted wit h water resources s hortage due to unreasonable de velop me nt or utilization. To utilize op timally and eff ectively t he limited groundwater resource, isotope technique was widely used to st udy groundwater cycle. Water samples were collected f rom wells for chemical and isotopic measurement all over t he middle reaches of Heihe River. Pipe r diagram gives two main t ypes of hydrochemical feat ures. On t he background of regional geology, combining isotope 18 O and Tritium wit h groundwater chemical analysis, different kinds of groundwater source and how to reple nis h groundwate r we re discove red. In t he uppe r two adjoining alluvial2p roluvial fans of t he study area, t here has no groundwater interflow ; t he groundwater is replenished f rom different sources. Groundwate r near Heihe River riverside comes f rom rive r seepage flow by t he highly conductive channel or f rom upp e r groundwate r wit h t he cont rol of geograp hy and top ograp hy. Zhangye basin and J iuquan basin were separated by uplift bedrock of Yumu hill, so t hey have different groundwate r replenishment systems, also diff e re nt groundwate r hydroche mist ry and isotop e characte rs. The groundwate r s ages we re app roximately es timated by radioactive isotop e t ritium analysis, being all younge r t han 32 yea rs. resea rch res ults can p rovide scie ntific bases f or rationally exploiting and effectively using t he groundwate r resources in t he middle reaches of Heihe River basin, so as to p rotect t he f ragile eco2environment. Keywords : Heihe River ; groundwater ; hydrochemist ry ; isotope The