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May 30 9 tweets 10 min read Twitter logo Read on Twitter
#KakhovkaReservoir #KakhovkaHPP
1/ Status Follow-up: 30 May 2023. Over-topping of #KakhovkaHPP dam continues, now occurring for a full month.
2/ Loop of several cloud-free Sentinel-2 passes of #KakhovkaHPP this month, latest 29 May 2023, show white turbulent flow downstream of sluice gates.
3/ @lhinnant published an article "Damage to Russian-occupied dam submerges Ukrainian reservoir island community" 25 May 2023 for @AP. Worth a read.
apnews.com/article/ukrain…
4/ Spatial context of @lhinnant story of the flooding of families in the village of Lysohirka, Zaporizhzhia, located on the farthest upstream portion, right bank, of the #KakhovkaReservoir. Image
5/ @riley_mellen and @heytherehaley also published an article for @nytimes on 17 May 2023 about #KakhovkaHPP water level. Article included a nice
#PlanetLabs image from 3 May 2023 clearly showing dam over-topping.
Image
6/ #KakhovkaHPP image taken back on 11 NOV 2023 by @Maxar. Image was taken the day after Russian occupiers blew up the road and rain deck about sluice gates 26-28 (far left side of image below) to block UAF pursuit of RF forces retreating to the left. Image
7/ With the start of water over-topping #KakhovkaHPP dam late April 2023, #KakhovkaReservoir water level has ceased increasing, remaining between 17.36-17.55 meters (almost 2 meters above normal) since May 1st as indicated by @PoleTheia water level data from Sentinel-6 altimetry. Image

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More from @davidhelms570

Jun 1
1/ I'm supporting @exit266 documenting the Black Sea Grain Initiative #BSGI #BlackSeaGrainInitiative providing marine wx impacting transit & inspection operations. This🧵is a bit off-topic, analyzing weather impact on @CarnivalCruise Sunshine cruise, 21-27 May 2023.
2/ On the evening of 26 May 2023 through mid-day 27 May 2023, the @CarnivalCruise ship #Sunshine experienced high winds and waves on its final leg of 21-27 May 2023 cruise from Charleston, South Carolina to The Bahamas Islands. Cite: @flyerscaptain @CrewCenter @CruiseHive @CNN Image
3/ First... some terms and definitions for the landlubbers ImageImage
Read 26 tweets
May 29
#NAFOWeather 🧵
1/ Weather week in review (23-29 May 2023): Widespread thunderstorms provided significant rain near the Line of Conflict (LoC), with a range of 15-90 mm in the south and 30-100 mm in the east and north. Image
2/ Rainfall from thunderstorms was not uniform with some locations close to the LoC receiving weekly peak total rainfall 80-105 mm including Oleshky, Vuhledar, Bakhmut and Raihorodka. Image
3/ Daily peak rainfall totals from thunderstorms max'ed out at 30-60 mm per day causing local flooding as reported by social media validating satellite precipitation accumulation analysis.
Image
Read 8 tweets
May 28
Iran, Taliban exchange heavy gunfire in conflict over water rights on Afghan border #WaterIsLife
pbs.org/newshour/world… Image
@PeterGleick Water Dispute Escalating between Iran and Afghanistan, August 2016
atlanticcouncil.org/wp-content/upl… ImageImage
Read 5 tweets
May 15
1. Soil Moisture Update: 15 May 2023, a #NAFOWeather🧵
I'm "officially" declaring #MudSeason over based on limited rainfall since May 1st & marginal rain forecast in the next 2 weeks. Soil is dry enough to support most vehicles across most of the LoC.
2. Recent Rainfall (past 2 weeks): Donetsk and Luhansk received about 5-15 mm rain of on May 8-9, otherwise, a dry 2 weeks. Image
3. Soil Moisture Change (past 2 weeks): There has been a general soil drying trend from 30 April to 14 May with least moisture in the south and greatest soil moisture in Donetsk. Image
Read 11 tweets
May 8
#KakhovkaReservoir #KakhovkaHPP Status Follow-up: 8 May 2023. Upon further analysis of 6 May 2023 Sentinel-2 imagery and consultation with @tom_bike @Gergyl & @BruckenRuski, we believe the #KakhovkaReservoir water is "over-topping" the #KakhovkaHPP dam. /1
Time-series loop from 27 March 2023 to 6 May 2023. Note the "brightening" downstream (left side) of the #KakhovkaHPP sluice gates last frame in loop which is water flowing over the top of the dam. Over-topping is particularly evident on the 3 northern most sluice gates. /2
Why is this happening? Recall the Russian occupiers blew up the road and rail deck above the #KakhovkaHPP dam sluice gates on 10 NOV 2022 as part of the RF retreat ("strategic repositioning") from the Dnipro right bank. /3
Read 12 tweets
May 7
1. Ruschist operation of Kakhovka HPP (K-HPP) dam has been reckless. Kakhovka Reservoir (KR) water level has alternated from record low to record high in just 3 months. Loop (6 FEB-6 MAY 2023) shows sand bars receding with rising KR water. #NAFOWeather🧵
2. These images are of the K-HPP from Left: 6 FEB, and Right: 6 MAY 2023 (enhanced from data included in loop). ImageImage
3. North Crimean Canal intake, Left 20 FEB 2023 Right 6 May 2023: Latest image show water gushing through NCC intake gate at Tavrisk as record KR level is pushing water through gravity fed NCC at high rates. ImageImage
Read 7 tweets

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