南阳盆地位于河南省西南部,西、北、东三面分别为秦岭、伏牛山、桐柏山环绕,南临汉江,面积约0.91万km2.在河南省水利厅2015年省级水资源费专项资金项 目的基础上,通过开展的水文地质调查、开采量调查、抽水试验、地下水位动态观测和资料收集等工作,取得了丰富的基础资料.本文通过对南阳盆地水文地质基础资料分析,全面了解南阳盆地中深层地下水的分布特征.结果表明:南阳盆地中深层地下水的深度为60～300 m.由北向南含水层顶板埋深逐渐变厚,厚度也逐渐增大,含水层颗粒由粗变细.由西向东含水层顶板埋深逐渐变浅,单层个数减少,总厚度随之变薄,含水层颗粒逐渐变细,泥质含量增高,富水性减弱.盆地内中深层地下水水位埋深大部分在10～20 m,盆地西北部,镇平县以西和南阳市茶庵一带地下水位埋深小于10 m.南阳市以西至镇平、赵河镇以西、唐河县北至太和、张店镇至大河屯镇、新野以南至五星镇、邓州市以西至张村镇地下水位埋深为20～40 m.丹江口水库以东地下水位埋深为40～60 m.
Analysis on the distribution characteristics of groundwater resources in the middle and deep layers of Nanyang Basin
The Nanyang Basin is located in the southwest of Henan Province,surrounded by the Qinling Mountains,Funiu Mountains,and Tongbai Mountains to the west,north,and east respectively.It borders the Han River to the south and covers an area of approximately 9100 km2.On the basis of the 2015 provincial water resources fee special fund project of Henan Pro-vincial Water Resources Department,a wealth of basic data has been obtained through hydro-geological survey,mining out-put survey,pumping test,dynamic observation of groundwater level and data collection.This article comprehensively under-stands the distribution characteristics of deep groundwater in the Nanyang Basin through the analysis of hydro-geological basic data.The results indicate that the depth of deep groundwater in the Nanyang Basin is 60～300 m.The burial depth of the top plate of the aquifer gradually thickens from north to south,and the thickness also gradually increases.The particles of the aq-uifer change from coarse to fine.The burial depth of the top plate of the aquifer gradually becomes shallower from west to east,the number of single layers decreases,the total thickness becomes thinner,the particles of the aquifer gradually become finer,the mud content increases,and the water richness weakens.The burial depth of groundwater in the middle and deep layers of the basin is mostly 10～20 m,while in the northwest of the basin,west of Zhenping County and in the Cha an area of Nanyang City,the burial depth of groundwater is less than 10 m.The groundwater depth from west of Nanyang City to Zhenping,west of Zhaohe Town,north of Tanghe County to Taihe,from Zhangdian Town to Daheitun Town,south of Xinye City to Wuxing Town,and west of Dengzhou City to Zhangcun Town is 20～40 m.The groundwater depth east of Danjiangkou Reservoir is 40～60 m.
Nanyang Basinmiddle and deep layersgroundwaterdistribution characteristics
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万方数据
