Evaluation of Erosion- Sedimentation processes in River Basins Valeriy Klenov Valeriy Klenov Self Employed Russia, Moscow

Introduction 1. The Virtual Nature System - River Basin(s), is intended for estimation of Real Systems responce on Nature and Human impacts. 2. Identify myself was done during long time field observations. 3. field investigations and computer modeling of geomorphic Systems: River Basins, Coastal Zone, River Nets, and others).

Topics of Discussion n River Basin is non-equilibrium Nature System. n Numerical method includes mass balance estimation and uses Genetic Coding. 2D simulation is accompanied by co-processing multi-layer computer maps. n Application 1: Decision Support uses some scenarios for minimization of catchment and ravine erosion at Building sites. n Application 2: Simulation of the System River Basin - Delta - Coastal Zone.

River Basin is NonEquilibrium System n Topography and precipitation determine complex structure for water/sediment flows through the System (RBNS). n System nonstabilities byThresholds, Stochastic Oscillations, and others) are caused and driven by Energy Potential Surface.

Numerical Methods n Data, parameters, restrictions. n Water/Sediment Balance estimation between a cell and its neighbours by use of transport capacity equations. n Genetic Coding - for keep in mind structure of flows and for simultaneous balance estimation. GC results in double strings. n Interface: Simulation is accompanied by co- processing multi-layer computer mapping.

Small River Basins n The object - small tributaries of big River. n It is risk of destination of Building sites by ravine growth, and catchment erosion. n The necessary information are usually insufficient. All available data are used for model parameters installation (scenario 0).

Application 1: Scenarios for VNS n Scenarios includes the Basin evolution without Human impacts (basic) and with various impacts: Soil proof, Soil destruction, Drainage and others. n Active Data Base permits to compare scenarios by analysis of images - for Decision Support.

Scenario 1: Without impacts

Scenario 2: Soil protection Protected area

Scenario 3: Destroyed Soils

Scenario 4: Catchment Drainage

References for Decision Support n For building safety to erosion the most effective is soil protection, coupled with drainage. n Soil protection of catchment leads to erosion/accumulation changes in surroundings. n For more accuracy of conclusions there are needed repeated observations.

Application 2. Large Basins n The coupled model is in work for the System: large River Basin - Delta - Coastal Zone (RDC). n RDC involves Coast Line and includes abrasion/accumulation processes by wind wave energy. n RDC is intended for evaluation of any impact consequences (floods, sea level changes, dams, contamination).

Rhine Basin’s Water Depth

Conclusions n The Virtual River Basin is intended for calculation of Human impact consequences (Soil Erosion, Contamination, and Land Use). The VNS is completed by Underground Water evaluation. n The VNS - Large River Basins is coupled with the Coastal Zone - for calculation of separate impacts (Sea Level Trends, Climatic Changes) on complex system.