Accurate forecasting of droughts can effectively reduce the risk drought. We propose a hybrid model based on complementary ensemble empirical mode decomposition (CEEMD) and long short-term memory (LSTM) to improve drought prediction accuracy. Taking Xinjiang Uygur Autonomous Region as an example, accuracy LSTM CEEMD-LSTM models for standardized precipitation index (SPI) multiple timescales was ...

In the present research, Soil and Water Assessment Tool (SWAT) model was used for prediction of surface runoff amounts catchment Al-Masad, in Western Desert Iraq. The period from September 2020 to January 2030. calibration verification this were performed according daily data that measured between 2010 2014. Statistical parameters employed determine performance model. These RSR (ratio root mean...

The FAO 56 Penman–Monteith equation (PM) is considered the most accurate method for estimating reference evapotranspiration (ETo). However, PM requires a large amount of data that not always available. Thus, objective this study to improve Hargreaves–Samani (HS) estimates in Peruvian Altiplano (PA) by calibrating radiation coefficient KRS. results show modified HS (HSM) ETo at validation after ...

In this work, we have proposed a novel methodology for greenhouse tomato yield prediction, which is based on hybrid of an explanatory biophysical model—the Tomgro model, and machine learning model called CNN-RNN. The CNN-RNN models are calibrated/trained predicting yields while different fusion approaches (linear, Bayesian, neural network, random forest gradient boosting) exploited fusing the p...

Objective. To validate a simulation model which enables the estimation of wheat (Triticum aestivum L.) production, based on climatic variables in lower Mayo River basin Sonora, Mexico. Design/methodology/ approach. The Soil and Water Assessment Tool (SWAT) Crop Yield was used to estimate productive yields. fed with data for 1979-2014 period, provided by National Centers Environmental Prediction...

Sediment transport models in river basins have been developed over the years for various temporal and spatial scales. However, yet few reported small-scale catchment still under investigation by many researchers. In this paper, a distributed model based on process was presented evaluating transportation of sediment small scale. The integration hydrological simulate soil erosion sedimentation pr...

In A Mathematician’s Apology [1] G. H. Hardy states, “8712 and 9801 are the only four-figure numbers which are integral multiples of their reversals”; and, he further comments that “this is not a serious theorem, as it is not capable of any significant generalization.” However, Hardy’s comment may have been short-sighted. In 1966, A. Sutcliffe [2] expanded this obscure fact about reversals. Ins...

in this study, application ofweap model (soil moisture method) have been investigated for simulating hydrological behavior in ahar-chai basin. according to the development of pressurized irrigation systems in this basin, since 2005, two models were carried out for two periods, pre-pressurized period (1998-2006) and pressurized period (2006-2013). irrigation method in first model was surface irr...

in this study, the process-based watershed model, soil and water assessment tool (swat), was used for simulating hydrology and sediment transport in the gharesou watershed and for identifying critical areas of soil erosion and water pollution. after model calibration and uncertainty analysis using sufi-2 (sequential uncertainty fitting, ver. 2) method, the outputs of the calibrated model were u...

the objective of this study was to evaluate the ability of ten gcms and three emission scenarios to reproduce the rainfall and temperature parameters in kermanshah, ravansar and west islamabad stations located inside qaresou basin in iran using the average weighting method, over 1989-2008 period. at first, the models output and the scenarios were provided for this period. then, the models valid...