Incorporation of positron emission tomography (PET) data into radiotherapy planning is currently under investigation for numerous sites including lung, brain, head and neck, breast, and prostate. Accurate tumor-volume quantification is essential to the proper utilization of the unique information provided by PET. Unfortunately,target delineation within PET currently remains a largely unaddresse...

The problems of land degradation and soil loss are among the major problems of watersheds in Iran. For erosion and sediment estimation one can use statistical and empirical methods. For doing this, land unit map and the map of effective factors should be prepared. For erosion and sediment estimation one can use statistical and empirical methods. However, these empirical methods are usually time...

in the present study, the soil and water assessment tool (swat 2000) model was tested on both a monthly and yearly basis and applied to the kordan watershed, located in iran. the main objective of the research was to assess the accuracy of the model in sediment-yield and surface water bicarbonate concentration estimation. the attributes of sub-watersheds, tributary channels and the main channel...

Rainfall has a significant impact on surface runoff and erosion in watershed, there is lack of information about the features rainfall regimes how they affect soil erosion. In paper, based 59 events from 2021 to 2022 lower Yellow River Culai Mountain sub-watershed, various statistical analysis methods were used preliminarily explore regime their influence The results showed that watershed was d...

Hung and Shaw’s (2005) trading-ratio system is modified to accommodate a management area approach wherein emissions sources are organized by impacts on identified “hot spots” and trading accounts for fixed as well as variable costs. An empirical example of phosphorus trading in a watershed with 22 potential traders demonstrates that marginal cost trading using a trading-ratio system yield nomin...

The goal of this study was to evaluate the water quality effects of alternative conservation practice scenarios using the SWAT (Soil and Water Assessment Tool) model in the Little River Experimental watershed, a representative coastal plain watershed located in southern Georgia. We simulated the water quality effect of two suites of upland conservation practices (CPs)—one targeting erosion and ...