Abstract
Land use change influences the hydrological as well as landscape processes such as runoff and sediment yields. The main objectives of this study are to assess the land use change and its impact on the runoff and sediment yield of the upper Serayu Catchment. Land use changes of 1991 to 2014 have been analyzed. Spectral similarity and vegetation indices were used to classify the old image. Therefore, the present and the past images are comparable. The influence of the past and present land use on runoff and sediment yield has been compared with field measurement. The effect of land use changes shows the increased surface runoff which is the result of change in the curve number (CN) values. The study shows that it is possible to classify previously obtained image based on spectral characteristics and indices of major land cover types derived from recently obtained image. This avoids the necessity of having training samples which will be difficult to obtain. On the other hand, it also demonstrates that it is possible to link land cover changes with land degradation processes and finally to sedimentation in the reservoir. The only condition is the requirement for having the comparable dataset which should not be difficult to generate. Any variation inherent in the data which are other than surface reflectance has to be corrected.
Highlights
Land degradation is a common problem threatening food security and deterioration of the environment [8][9]
In the degradation processes bio-physical factors play an important role while land cover/land use changes often work in triggering or accelerating the process[7][10]
Other causes for deforestation leading to land cover changes are shifting cultivation [1][20][23], commercial farming, governmental policy change[6][13][30] or due to conflicts or political cause [28]
Summary
Land degradation is a common problem threatening food security and deterioration of the environment [8][9]. In the degradation processes bio-physical factors play an important role while land cover/land use changes often work in triggering or accelerating the process[7][10]. The main cause of land cover change which occurred in various parts of the world is often due to increase of population which forces the clearing of natural forest in order to create land for cultivation[15][17][26][29][36]. In order to study the impact of land use changes on land degradation it is imperative to study change pattern for which remote sensing techniques have played an important role. A variety of techniques starting from comparison of visual interpretation or classification of images obtained in different dates[5][25] to complex change detection techniques such as cross-correlogram
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: IOP Conference Series: Earth and Environmental Science
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
