494
properties would be of great importance for crop
monitoring ('CROPSAT': Bouwmans 1985). At present
technical and economical constraints make such a
solution rather unlikely. The data produced by the
LANDSAT-TM scanner and the SPOT satellite does al
ready put a serious challenge to the current proces
sing capabilities of both satellite operators and
users. This is notwithstanding the request dependent
coverage of both satellites. For the time being ap
plication of MSS-techniques in humid regions with
intensive land use, as in the Netherlands, will main
ly depend on airborne sensors.
sensing. Deelrapport 4, remote sensing studiepro-
ject Oost-Gelderland. Nota 1542. Institute for
Land and Water Management Research, Wageningen.
85 pp.
Tucker, C.J. 1977. Use of near infrared/red radiance
ratios for estimating vegetation biomass and
physiological status. Proc. 11th int. symposium of
remote sensing of environment 1:493-494.
REFERENCES
Badhwar, G.D., J.G. Carnes & W.W. Austin 1982. Use of
LANDSAT-derived temporal profiles for corn - soy
bean feature extraction and classification. Remote
Sens. Environ. 12:57-79.
Batista, G.T., H.M. Hixson & M.E. Bauer 1985. LAND-
SAT-MSS crop classification performance as a func
tion of scene characteristics. Int. J. Remote
Sensing 6,9:1521-1533.
Belmans, C., J.G. Wesseling & R.A. Feddes 1983. Simu
lation model of the water balance of a cropped soil:
SWATRE. J. Hydro1. 63:271-286. Techn. Bull, ns 21.
Institute for Land and Water Management Research
(ICW), Wageningen.
Bouwmans, J.M.M. 1985. Practical application of remote
sensing techniques in water management problems,
state of the art. Proc. Intern, workshop on hydro-
logic applications of space technology. Cocoa
Beach, Florida, August 18-23 (in press).
Crist, E. & W. Malila 1981. A technique for automatic
labeling of LANDSAT agricultural scene elements by
analysis of temporal-spectral patterns. Proc. 15th
intern, symposium on remote sensing of environment.
Ann Arbor, Michigan:1227-1236.
Feddes, R.A., P.J. Kowalik & H. Zaradny 1978. Simula
tion of field water use and crop yield. Simulation
Monographs. PUDOC, Wageningen. 189 pp.
Jackson, R.D., R.J. Reginato & S.B. Idso 1977. Wheat
canopy temperature: a practical tool for evaluating
water requirements. Water Res. Res. 13:651-656.
Kok, A. 1984. Studie naar de effecten van grondverbe-
tering in de veenkoloniën met remote sensing. Nota
1532. Institute for Land and Water Management Re
search (ICW), Wageningen. 50 pp.
Laat, P.J.M. de & R.H.C.M. Awater 1978. Groundwater
flow and évapotranspiration; a simulation model.
Part 1. Theory. Basisrapport Commissie Bestudering
Waterhuishouding Gelderland. Provinciale Waterstaat
van Gelderland, Arnhem. 64 pp.
Nieuwenhuis, G.J.A., E.H. Smidt & H.A.M. Thunnissen
1985. Estimation of regional évapotranspiration of
arable crops from thermal infrared images. Int. J.
Remote Sensing 6,8:1319-1334.
Seguin, B. & B. Itier 1983. Using midday surface tem
perature to estimate daily evaporation from satel
lite thermal IR data. Int. J. Remote Sensing 4,2:
371-383.
Soer, G.J.R. 1977. The TERGRA model - a mathematical
model for the simulation of the daily behaviour of
crop surface temperature and actual évapotranspira
tion. Nota 1014. Institute for Land and Water
Management Research (ICW), Wageningen. 44 pp.
Spaans, J.H. 1985. Studie naar de invloed van leemla-
gen in de ondergrond op de vochtvoorziening van
gras en mais in een gebied nabij Rucphen (West-
Brabant); de toepassing van remote sensing technie-
ken en hydrologische modelberekeningen. Nota 1696.
Institute for Land and Water Management Research,
Wageningen. 57 pp.
Thunnissen, H.A.M. 1984a. Eenvoudige méthode voor de
bepaling van de régionale gewasverdamping. Deelrap
port 6, remote sensing studieproject Oost-Gelder-
land. Nota 1580. Institute for land and Water
Management Research, Wageningen. 39 pp.
Thunnissen, H.A.M. 1984b. Hydrologisch onderzoek:
toepassing van hydrologische modellen en remote
