Ephemeral gullies and ecosystems services: Social and biophysical factors
نویسندگان
چکیده
........................................................................................................................ 6 Introduction ................................................................................................................... 7 Materials and Methods ................................................................................................ 11 Site Description ............................................................................................... 11 Annual Soil Loss from Ephemeral Gully Channel ......................................... 12 Sediment Yield per Event from Small Watershed containing Ephemeral Gully ............................................................... 12 Model Inputs ................................................................................................... 13 Model Evaluation ............................................................................................ 15 Results and Discussion ............................................................................................... 16 Annual Loss from Ephemeral Gully Channels ............................................... 16 Yield per Event from Small Watershed with Ephemeral Gully ..................... 17 Summary and Conclusions ......................................................................................... 19
منابع مشابه
Deriving Ephemeral Gullies from VHR Image in Loess Hilly Areas through Directional Edge Detection
Monitoring ephemeral gullies facilitates water planning and soil conservation. Artificial interpretation based on high spatial resolution images is the main method for monitoring ephemeral gullies in large areas; however, this method is time consuming. In this study, a semiautomatic method for extracting ephemeral gullies in loess hilly areas based on directional edge detection is proposed. Fir...
متن کاملUncovering Ecosystem Service Bundles through Social Preferences
Ecosystem service assessments have increasingly been used to support environmental management policies, mainly based on biophysical and economic indicators. However, few studies have coped with the social-cultural dimension of ecosystem services, despite being considered a research priority. We examined how ecosystem service bundles and trade-offs emerge from diverging social preferences toward...
متن کاملDetermining Effective Factors on Gullies Development in Mazayjan Watershed, Fars Province, Using Multivariate Statistical Methods
Gully erosion is one of the causes of land degradation, which causes a lot of damage with the loss of fertile soil. For this purpose, in the present study, using the Cochran relation, 40 gullies were selected for measurement in the Mazayjan watershed located in the southeast of Fars province. Factor analysis method was used to determine the factors affecting the classification of samples. Backw...
متن کاملDetermination of the Influencing Factors on the Length Extension of Gullies in Ghazeian Watershed, Fars Province
Due to soil degradation and abundant of sediment production, the exact recognition of affecting factors on gullies erosion, and the impact of various factors on gully’s formation and development, require a more accurate study. In this regard, in the present study the length of gully, the area above headcut, headcut slope, percent of closed grain, bare soil, cover vegetation, litter, saturated e...
متن کاملDust storms and ephemeral lakes
In drylands, both dust storms and ephemeral salt lakes (playas) are common. Observations using remote sensing and ground studies have shown that these playas can be major sources of saline dust storms. Some basins have recently become desiccated as a result of water abstraction by humans, and these have become significant sources of dust. The timing and amounts of dust emissions depends on such...
متن کامل