Demarcation of Groundwater Prospect Zones in Lower Reaches of Daraudi River Basin, Western Nepal

Volume 4 - Issue 1

Dinesh Pathak¹* and Menuka Gautam²

Received: September 24, 2019;   Published: October 21, 2019

DOI: 10.32474/OAJESS.2019.04.000177

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Abstract

This study was objectively done to compare between estimated growing stocks from sampling using rectangular, square, and circular plot and complete enumeration and assess efficient sample plot shape for inventory. Jaldevi and Panchkanya community forests (CF) of Chitwan district in Nepal were selected for study. Complete inventory and systematic sampling with varying shapes were applied. Altogether 135 plots were measured; 15 plots for each stage (tree, pole, and sapling) and each plots shape. The diameter and height were measured, and numbers of plants were counted. Time was recorded for plot layout and measurement and calculation. Growing stock was calculated and compared for both data obtained from complete inventory and sampling with varying shapes. Result showed that, stock density was 121 trees/ha in total enumeration, while estimated values were 120±16, 116±13.94 and 108±12.3826 trees/ ha from sampling using circular, square and rectangular plots respectively. The difference in stand density was 1, 5 and 13 tree/ha with the value of complete enumeration and estimated from sampling using circular, square and rectangular plots respectively. Similar differences were found between values of basal area and volumes estimated using different shapes and complete enumeration. However, the One-way ANOVA showed that, none of stocks (density, basal area and volume) was significantly differed (P >0.05) and so as independent t-test (P>0.05). It was the highest estimated value of E2 T with 33582.51 for rectangular shape and least 11226.62 for circular plot of stand density/ha at tree stage. So, the circular shape is more efficient for forest inventory. Keywords: Inventory; Sampling; Plot shape; Growing stock; Sampling efficiency.

Keywords: Inventory; Sampling; Plot shape; Growing stock; Sampling efficiency

Abstract| Introduction| Materials and Methods| Result| Discussion| Conclusion and Recommendation| References|