River and Reservoir Watch Version 3.7

This work and associated data are protected by a Creative Commons License.

River Discharge and Reservoir Storage Changes Using Satellite Microwave Radiometry

Lake Nasser

Nile

Center:

31.12

Long.

S/N rating:

Fair

GFDS Site Number

11842

Modis History

Sudan

Center:

21.63

Lat.

GEE Time Lapse

Learn more about this reservoir

sq km

WBM contributing area

Last measured:

17-Jan-21

Obtain Data

Status:

#N/A

of maximum

Status:

#N/A

(1, low; 2, normal; 3, high; 4, very high)*

#N/A

*See below for threshold definitions

Technical Summary

Recent part of record. Five-day forward moving average is applied.

10-day forward moving average is applied.

Thresholds (adjusted for each day of the year)

17-Jan-21

Complete record. Five-day forward moving average is applied

<25th percentile

Low, "1"

25th:

#N/A

25th-74th percentile

Normal, "2"

75th:

#N/A

75th-90th percentile

High, "3"

90th:

#N/A

>90th percentile

Very high, "4"

Percentiles are for a fixed 10 year reference period (2003-2013)

Site statistics:

noise*:

0.016

signal/noise:

4.3

signal**:

0.070

* average of daily signal change, 1998-2010.

**range of signal, 2003-2007

Also provided below are G-REALM Height Variations from TOPEX/POSEIDON/Jason-1 and Jason-2/OSTM Altimetry

The scale is  shown on the right axis. These are relative lake height variations computed from TOPEX/POSEIDON (T/P), Jason-1 and Jason-2/OSTM altimetry

with respect to a datum that is based on a single fly-over date of the Jason-2/OSTM mission.