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    INTERNATIONAL JOURNALS
     
    Frequency: Quarterly
    ISSN Online: 2581-6853
    Language: English

     
     

    Grassroots Journal of Natural Resources

    Vol. 2, No. 3 (2019)

     

    Modeling of Tree Volume against Crown Area for Dalbergia sissoo Stand in Hariyarpur Community Forest of Nepal

    Santosh Ghimire, Jeetendra Gautam

    Abstract: Complex geographical features and forest inventory methods are more time consuming, expensive and labour-intensive. Therefore, development of model equation is important. To conduct this study, systematic sampling technique was adopted with 5% sample intensity. Tree volume was calculated from field inventory and crown area calculated from Google Earth imagery. R-Programme was used for data analysis and various tests (ANOVA, F-test and Z-test) were done for model validation. The best-fitted model of tree volume against the crown area for Dalbergia sissoo stand was obtained (Volume = A*Crown^2 + B*Crown + C) using Root Mean Square Error (RMSE) value 0.054 and Coefficient of Determination (R2) value 0.9125153. The trend of this model exhibits that volume distribution varied in direct proportion to the extent of crown cover area up to certain limit. With further increase in extent of crown area, the volume distribution shows an inverse relationship. This model can be used to predict the tree volume for Dalbergia sissoo stand of 15-20 years of age. This model, in turn, will be helpful for managers, planners, foresters and decision-makers for better management and utilization of Dalbergia sissoo forest.

    Full Article
    1-15

       
     

    Landscape Level Efforts to Biodiversity Conservation in Nepal: A Review of Current Approach and Lessons Learned

    Pramod Ghimire

    Abstract: Nepal’s location in the centre of the Himalayan range places the country in the transitional zone between the eastern and western Himalayas. Nepal’s rich biodiversity is a reflection of this unique geographical position as well as its altitudinal and climatic variations. It is recorded that Nepal has a total of 118 types of ecosystem, 75 vegetation and 35 types of forests. Nepal has put utmost efforts to conserve its rich biodiversity resources. The conservation history began formally after promulgation of National Parks and Wildlife Conservation Act in 1973. National parks and wildlife reserves were established across the country during the 1970s. However, very soon not only some of the adversities were faced by the local people living around the parks and reserves but also the space constraint was realized for the population distribution and dynamics. By realizing the need of people’s participation in the conservation initiatives, country has tested the concept of different types of protected areas system such as national park, wildlife reserve, conservation areas, and buffer zones over the years. Taking the advantage of new progresses in conservation biology, Nepal adopted landscape level approach to biodiversity conservation and implemented such approaches in some of the key areas since 2000s. This paper discusses Nepal’s effort in implementing landscape level approach to biodiversity conservation and the lessons learned at national context.

    Full Article
    16-24

       

    Flood Risk Mapping and Analysis Using Hydrodynamic Model HEC-RAS: A Case Study of Daraudi River, Chhepatar, Gorkha, Nepal

    Pratibha Banstola, Bidhan Sapkota

    Abstract: Nepal has been ranked as one of the most multiple hazard prone countries in the world. Studies claim flood as the most common and third most deadly disaster in Nepal. It causes loss of life, casualties, financial loss and displacement. Heavy monsoon, fragile geography, constructions along the embankments and mining in the upstream riverbeds cause the river to flood. Daraudi River, one of the seven tributaries of Gandaki River, experience flood every year. Despite regular flooding, no studies have been carried out in the river zone. Hence, this study is carried out in the Chhepetar flood plain of Daraudi River basin. This article is based on a study that used HEC-RAS, HEC-GeoRAS and ArcGIS for preparation of 1D flood plain maps and WECS/DHM method to analyze the flood frequency in different return periods. The flooding in the river is found to be correlated with maximum rainfall in a year and occurs particularly between June and September every year – the period of Monsoon season in Nepal. A direct relationship between the inundation area and the flood discharge of various return periods has been identified. Plantation, bioengineering technique, dry wall construction on the river bank and different non-structural approaches of flood management have been suggested by the study for eco-restoration.

    Full Article
    25-44

       

    Water Crisis in Making in Iran

    Shahrzad Khatibi, Hasrat Arjjumend

    Abstract: Iran is located in an arid and semi-arid region and is currently facing a serious water crisis. The climate change, droughts and political and economic problems are believed to have aggravated the water crisis. As a result, management solutions to resolve the water crisis are critically important. This paper discusses the current status of water resources in Iran and the root causes of water crisis, including population growth, inefficient agriculture, concurrent droughts and mismanagement of available water. If Iran wants to survive, it must prioritize water resources management in the country.

    Full Article
    45-54