GroMoPo Metadata for Nalgonda district model

Kanchanapally watershed covering an area of about 11 km(2) in Nalgonda district, Andhra Pradesh, India is located in granitic terrain. Groundwater recharge has been estimated from a water balance model using hydrometeorological data from 1978-1994. The monthly recharge estimates obtained from the water balance model formed input for the groundwater flow model during transient model testing. The groundwater flow model has been prepared to simulate steady state groundwater conditions of 1977 using the nested squares finite difference method. The transient groundwater flow model has been tested during 1977-1994 using the estimated recharge values. The present study helped verify the usefulness of monthly recharge estimates for accounting dynamic variations in recharge as reflected in water level fluctuations in hydrographs.

位于印度安得拉邦纳尔贡达县的坎昌帕利流域（Kanchanapally watershed）面积约11 km²，地处花岗岩地貌（granitic terrain）区域。本研究依托1978—1994年的水文气象数据，通过水平衡模型（water balance model）估算了该流域的地下水补给量。由水平衡模型得到的月尺度补给量估算值，被用作暂态地下水流模型（transient groundwater flow model）验证阶段的输入参数。研究采用嵌套平方有限差分法（nested squares finite difference method），构建了用于模拟1977年稳态地下水流条件的地下水流模型。随后利用1977—1994年的估算补给值，对暂态地下水流模型开展了验证工作。本研究证实，月尺度补给量估算值可有效刻画补给的动态变化，该变化可通过水位过程线（hydrographs）中的水位波动得以体现。