Herbicides applied in cropping in the Great Barrier Reef catchment in Queensland, pose a threat to water quality in riverine environments and the reef lagoon. With the introduction of ReefPlan in 2009, which sets a target of a 50% reduction in herbicides entering the Great Barrier Reef lagoon by 2013, there is a need to investigate water quality implications of weed management practices. Models...

An urban watershed in Xiamen was selected to perform the parameter uncertainty analysis for urban stormwater runoff modeling in terms of identification and sensitivity analysis based on storm water management model (SWMM) using Monte-Carlo sampling and regionalized sensitivity analysis (RSA) algorithm. Results show that Dstore-Imperv, Dstore-Perv and Curve Number (CN) are the identifiable param...

Soil preferential flow is an essential process that affects the movement and relocation of soil water solutes. This study was conducted on cropland in arid semi-arid area Zhongning County, Ningxia. According to different cracks, rain intensity, rainfall duration, slope, there were three groups, 17 dye tracer experiments field. We quantified characteristics by investigating analyzing infiltratio...

The soil sorption coefficient Kd and the soil organic carbon sorption coefficient KOC of pesticides are basic parameters used by environmental scientists and regulatory agencies worldwide in describing the environmental fate and behavior of pesticides. They are a measure of the strength of sorption of pesticides to soils and other geosorbent surfaces at the water/solid interface, and are thus d...

There have been several proposals to evaluate potential runoff in center pivot irrigation, through the integration of time varying infiltration–precipitation rate curves, involving complex iterative procedures. Some methods use empirical infiltration functions, such as the Kostiakov equation. Others use physically based infiltration functions, such as the Green–Ampt equation. Another option is ...

A digital filtering algorithm for continuous base flow separation is compared to physically based simulations of base flow. It is shown that the digital filter gives comparable results to model simulations in terms of the multiyear base flow index when a filter coefficient is used that replicates the watershed-specific time delay of model simulations. This way, the application of the heuristic ...

runoff production process is a key hydrological component illustrating watersheds health. water infiltration in soil is also one of the determinant factors on runoff generation for which many techniques were used to improve it. however, the role of microorganisms for the improvement of water infiltration in soil has been less considered. the present study therefore tried to investigate the effe...

The outputs of Rainfall-runoff models are inherently uncertain and quantifying the associated uncertainty is crucial for water resources management activities. This study presents quantification rainfall-runoff simulations using copula-based Bayesian processor (CBP) in Danjiangkou Reservoir basin, China. seasonality modeling explored, impacts copula selection correlation coefficient on results ...

Abstract. Wind drift has a significant influence on the rainfall–runoff relationship in urban high-rise building areas since oblique rainfall caused by wind can interact with walls. However, impact of inclination angle process not been studied. In this study, between and such was explored. A theoretical framework developed to describe their relationship, including computational fluid dynamics (...