She is working for the United Nations children's agency, Unicef, in Nyala, southern Darfur and is writing a diary for BBC News Online about her experiences.

1330:

I'm on my way to the airport for a flight to Khartoum. It is just over a week ago that I came from Khartoum with a WFP (World Food Programme) flight in a comfortable Beech 1900 D. Now I'm flying back with a commercial flight with signs in Russian. I'm told that my ticket will be ready at the airport, but unfortunately it turns out that my name is not on the list.

Aid agencies and the government are building new water points for the refugees

This is very strange because the Khartoum office confirms the booking with a booking number. After some hours of confusion I manage to see the passenger list and see my name written as: WESTER BEEK. That's me I say. No, that is not you is the answer because the person on the list works for the Red Cross.

How many Westerbeeks do you think would there be in Nyala - Darfur - Sudan? Not too many is my guess and finally we manage to convince the airport officials that a mistake could have been made by writing the name of another organisation down. Ma'alesh (don't worry.)

1700:

I have a seat next to two children who are sitting almost on top of each other as they are sharing one seat. They are so healthy, clean and well dressed!

Somehow I'm not used to this any more as I've seen so many malnourished, dirty children with runny noses in rags in the last week. It is strange how one's perception of "normal" changes in such a short while.

I wonder how Siham is doing. Siham is a young girl of about 15, whom I met in Kalma camp yesterday. About one-and-a-half months ago she had an accident while using a hand pump.

Q&A: Darfur conflict

The handle of the water pump bounced back and hit her hip - I still wonder how this is possible but her mother saw it happen. While she was recovering, their village (Tabllidyat, about 35 km south of Nyala) was attacked.

Some family members got killed and she, her mother and about 50 other families fled to Kalma camp. It's a miracle that she, in her condition reached the camp five days ago.

They have spent all their money on transport and need to wait for a couple of days before the food distribution will take place. The first food distribution took place in June and the second one is expected to be within five days.

Siham can hardly move, she looks thin and completely exhausted. I take her to the Unicef-supported clinic run by the state ministry of health, as I know that they have the basic facilities and supplies and a very capable and friendly doctor.

He refers her to the hospital in Nyala for an X-ray. I hope they can help her as the IDPs are supposed to receive health care for free.

In Kalma camp the majority of the water points have a child friendly handle with four taps. In addition water pumps are also being constructed, but I'm sure that they are definitively of a better quality than the one in Siham's village.

The state branch of the National Water Corporation, several NGOs and Unicef are rehabilitating and constructing safe water points. Each water point should serve about 500 people. This is a huge job keeping in mind that there are over 1 million IDPs in the Darfur region.

1900:

I go to the Unicef office in Khartoum to catch up with the latest news. My boss - Paula - kept me a chocolate bar. What a treat!