Inst. of Research for Integrated Managementof Coastal Zones PRESENTATION (vegetation & Flow studies): FRANCISCO MARTÍNEZ CAPEL DOCTOR INGENIERO DE MONTES - Study in River Mijares (3 regulated sites) PhD, FORESTRY ENGINEERING - Study in River Serpis (1 regulated site) - Study for comparison between 2 rivers DPTO. INGENIERÍA HIDRÁULICA Y MEDIO AMBIENTE - Advanced studies in River Serpis: Methods UNIVERSIDAD POLITÉCNICA DE VALENCIA ADDRESS: E.P.S. GANDIA (UNIVERSIDAD POLITÉCNICA DE VALENCIA) Ctra. Nazaret-Oliva s/n GANDIA, 46730 VALENCIA. SPAIN. Ph.Nº: (+34)-96-2849300 E-mail: fmcapel@dihma.upv.es Web: //personales.gan.upv.es/fmcapel RIVER MIJARES Elevation above thalweg representing Tolerance to Inundation within river Mijares (3 regulated sites) and also distance from Thalweg N = 97 N = 47 N = 75 N = 65 N = 8 N = 6 N = 6 N = 8 N = 75 N = 65 N = 97 N = 47 The study also included hydraulic simulation, and recommendations of changing dam operation to produce environmental flows for riparian forest regeneration RIPARIAN SPECIES AND FLOW REGIME: ECOLOGICAL STUDIES FOR APPLICATION IN ENVIRONMENTAL FLOW ASSESSMENTS AND RIVER RESTORATION (MIJARES RIVER, SPAIN) Garófano-Gómez V., Martínez-Capel F. Nebot T., Mondéjar N.,Cavallé A., Morillo R. Proceedings of the 4th ECRR Congress, Venice (June, 2008) 1
RIVER SERPIS Elevation above thalweg representing Tolerance to Inundation within river Serpis (1 regulated site) and also distance from Thalweg Functional groups about tolerance could be derived from these data for vegetation model RIB-Av Phragmites australis (PH), Salix atrocinerea (SA), Populus alba (PA), Nerium oleander (NO), Crataegus monogyna (CR), Populus nigra (PN) The study incorporated two field work approaches : sampling by transects and sampling by habitat patches (finished recently), in order to recommen changes in regulated flows GESTIÓN DEL AGUA PARA LA CONSERVACIÓN DE LAS RIBERAS DEL RÍO SERPIS Report for CEIC Alfons el Vell (Ayuntamiento de Gandia), dic-2008 RIVERS SERPIS & MIJARES Comparison of elevation above thalweg representing Tolerance to Inundation (within rivers & transferability across rivers) Serpis Mijares-1 Mijares-2 The study allowed the comparison among reaches, for 3 species and the assessment of transferability of height above channel thalweg as a useful parameter in vegetation models DISTRIBUTION PATTERNS OF RIPARIAN SPECIES IN RELATION TO CHANNEL BED IN TWO MEDITERRANEAN RIVERS. V. Garófano-Gómez, F. Martínez-Capel, F. Francés 7th internat. Symposium on ecohydraulics. Concepción, Chile (January 2008) 2
VEGETATION ANALYSIS IN THE RIVER SERPIS (from large dam to the sea) principal coordinates analysis with abundance matrix (Braun-Blanquet transformed) in 16 study segments Bad state Good state Group 3 Group 1 M o d e r a Group 2 t e s t a t e GESTIÓN DEL AGUA PARA LA CONSERVACIÓN DE LAS RIBERAS DEL RÍO SERPIS Report for CEIC Alfons el Vell (Ayuntamiento de Gandia), dic-2008 VEGETATION ANALYSIS IN THE RIVER SERPIS Overview of study reach for hydraulic simulation: transects and iron rods (red) Hydraulic model 1-dim (running RHYHABSIM, Jowett 1989) • 25 transects • Only 11 transects were used to study vegetation-flow relationships 3
VEGETATION ANALYSIS IN THE RIVER SERPIS Location of the Transects and Hydrometry • Study of great detail with representative reach • All transects with same datum (elevation reference), this allow the hydraulic modelling based on Rating Curves and also water surface profile modelling ∆ w i D i V V i i Cross-section or transect Divided into “cells” or pieces Of section where we measure VEGETATION ANALYSIS IN THE RIVER SERPIS Vegetation Survey by habitat patches Biological Assessment: Habitat patch - Species Abundances - Veget. cover End Modified from FIREMON (2003), in Harris et al. (2005). Beginning 4
VEGETATION ANALYSIS IN THE RIVER SERPIS Soil Sampling To estimate in Laboratory: - Organic matter content (%) - Texture Necessary to obtain parameters of RIB-Av (thickness of capillary fringe) VEGETATION ANALYSIS IN THE RIVER SERPIS Hydraulic Modelling Cross-section: SEC-24 11.20 Rating types Survey stage and flow 11.04 Gaugings Based on Rating Curves Critical Rating Level (m) 10.88 SZF Rating: (flow-water elevation) Q = 2.35 x ( H - 10.375 ) ^ 2.10 10.72 Best SZF Rating: Q = 1.70 x ( H - 10.216 ) ^ 2.76 Hydraulic Rating: 10.56 N = 0.073 x Q ^ -0.02 10.40 0.00 0.25 0.50 0.75 1.00 1.25 Flow (m 3 /s) Reach : SERPIS~1 11.2 10.9 Plan B Elevation (m) 10.5 Based on Water Surface 10.2 Profile Modelling (WSP) 9.9 (similar to HEC-Ras) 9.5 9.2 0 50 100 150 200 250 Distance (m) Transects where water surface profile has a break, hydraulic controls,chenge of mesohabitat, etc. 5
VEGETATION ANALYSIS IN THE RIVER SERPIS Growth curves VEGETATION ANALYSIS IN THE RIVER SERPIS Growth curves N=34 N=25 6
VEGETATION ANALYSIS IN THE RIVER SERPIS Data Processing • Getting/calculating daily flow records in site • Calculating time series of Water Surface Elevation at each transect • Associating such time series to the different habitat patches observed (since the time we estimate this patch appeared –max. tree age-) • Estimating hydrological parameters associated to each habitat patch (succession faces): flow rate that started succession, inundation frequency, time of continuous inundation, others. • Estimation of necessary flow to inundate riparian forest area, and flow recession rate for forest regeneration (based on internat. Studies or local studies) � management recommendations -End of Previous Works - For Definition of Field Methods we need to define BEFORE the arquitecture of the model (input-output) Planning Field Work - RIPFLOW Flow direction Transect-1 (downstream) Transect-n (upstream) 7
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