Food security experts said a famine reported in August had been alleviated but that the situation remained dire across the enclave, despite a cease-fire in October and greater flows of aid.
The project could offer relief for tens of thousands of Palestinians who have endured two years of war, but has raised questions about whether it could entrench the partition of Gaza into Israeli- and Hamas-controlled zones.
Heavy rainfall and chilling winds have added to the challenges facing people still forced to live in tents in the devastated territory.
Residents who have gone back to the battered north of the territory after the cease-fire say it is a wasteland that will take years to rebuild.
The Israeli prime minister, Benjamin Netanyahu, has been on trial for corruption since 2020, battling charges of bribery, fraud and breach of trust in three separate but related cases.